Answers
Answer:
Answer: B. 12 N
Explanation:
Static Equilibrium
Static equilibrium occurs when an object is at rest, i.e., neither rotating nor translating.
In the static rotational equilibrium, the total torque is zero with respect to any rotational axis.
The torque applied by a force F perpendicular to a displacement X with respect to a reference rotating point is:
T = F*X
Considering the pivot as the rotating point, there are 3 forces producing torque. Let's consider counterclockwise torques as positive, thus:
30N * 40 cm - 60 N * 30 cm + F (30 cm + 20 cm) = 0
Operating:
1200 N.cm - 1800 N.cm + F(50 cm) = 0
- 600 N.cm + F(50 cm) = 0
Solving for F:
F = 600/50
F = 12 N
Answer: B. 12 N
Related Questions
the mass of a high speed train is 4.5 ×× 105 kgkg , and it is traveling forward at a velocity of 8.3 ×× 101 m/sm/s . given that momentum equals mass times velocity, determine the values of mm and nn when the momentum of the train (in kg⋅m/skg⋅m/s ) is written in scientific notation. enter mm and nn , separated by commas.
Answers
2. The value of n is 7
What is momentum?Momentum is defined as the product of mass and velocity. It is expressed as
Momentum = mass × velocity
How to determine the value of m and nWe can obtain the value of m and n by simply obtaining the momentum in scientific notation. This is illustrated below:
Mass of train = 4.5×10⁵ KgVelocity of train = 8.3×10¹ m/sMomentum =?Momentum = mass × velocity
Momentum = 4.5×10⁵ × 8.3×10¹
Momentum = 3.735×10⁷ Kg⋅m/s
Thus, the value of m and n are: 3.735 and 7
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Moment of force = ………….. [1]
Distance between A and M = ………….. [2]
Answers
Answer:
(a) Picture Attached
(b)
i. 30 Nm
ii. Distance between A and M = 0.375 m
Explanation:
(a)
The other two forces are as follows:
1. The weight of wheel barrows acting downward at Point m
2. The Normal Reaction acting upward on wheel
These are show in the picture attached in solution.
(b)
i-
Now, for the moment of 20 N force about the point A:
[tex]Moment = Fd\\\\where,\\\\F = Force = 20\ N\\d = perpendicular\ distance between\ force\ and point\ A = 1.5\ m\\Therefore,\\Moment = (20\ N)(1.5\ m)[/tex]
Moment = 30 Nm
ii.
We take the sum of all moments about point A. Taking counter-clockwise direction as positive:
[tex](Weight)(AM) - Moment\ due\ to\ 20\ N Force = 0\\(80\ N)(AM) = (30\ Nm)\\AM = Distance\ between\ A\ and\ M = \frac{30\ Nm}{80\ N}\\\\[/tex]
Distance between A and M = 0.375 m
Determine the kinetic energy of a 1000 kg roller coaster car that is moving with speed of 40.0 m/s
Answers
Answer:
KE=800,000
Explanation:
The formula for kinetic energy is KE=1/2mv^2 or Kinetic Energy= 0.5*mass*velocity^2
so 1000 is the mass and 40 is the velocity
KE=0.5*1000*40^2
KE=0.5*1,000*1,600
KE=800,000 Joules
An atom has a mass of 24 and a nuclear charge of 12. Which statement about the atom is accurate?
O It has twice as many protons as electrons.
O It has twice as many neutrons as protons.
O
It has equal numbers of neutrons and protons.
O It has equal numbers of nuclear particles and electrons.
Answers
The correct answer is It has equal numbers of neutrons and protons.
A characteristic that can be physically determined, the atomic mass of an atom is equal to the total mass of the protons, neutrons, and electrons that make up the atom. The number of protons in the atom's nucleus is indicated by the atomic number. It is equal to the atomic number in value. Moving over the periodic table causes the nuclear charge to grow. The charge is filled when the electrons approach the protons.
The protons and neutrons of an atom are added to determine the mass number. Therefore, the mass number for each atom will be twice the atomic number (number of protons) if the number of protons (atomic number) and neutrons are identical.
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28) What is the net force on this box? *
A- 10 N to the left
B- 10 N to the right
C- 60 N to the left
D- 50 N to the right
Answers
Answer:
C- 60 N to the left
Explanation:
there is a 60n arrow to the left of the box
A 6.8 kg cannon ball leaves a canon with a speed of 188 m/s. Find the average net force applied to the ball if the cannon muzzle is 4.2 m long.
i want the answer with the steps
Answers
Answer:
its not long dummy, its your imagination
Explanation:
Gravity accelerates any object falling at 9.8 m/s2. What is the force that will be applied to the ground if an 88 kg box falls from the top of a shelf to the ground?
Answers
Answer:
The force is of the weight 862,4 Newtons.
Explanation:
We have the formula:
w = m * g
Data:
w = weight = ¿?
m = mass = 88 kg
g = gravity = 9,8 m/s
Replacing according formula:
w = 88 kg * 9,8 m/s
Resolving:
w = 862,4 N
Fill in the missing word. Nuclear fusion is difficult to achieve because at low temperatures and pressures
the positively charged nuclei of deuterium and tritium electrostatically
each other.
Answers
Answer:
Nuclear fusion is difficult to achieve because at low temperatures and pressures the positively charged nuclei of deuterium and tritium electrostatically each other is explained below in complete details.
Explanation:
For nuclear fusion to happen, very eminent temperatures are needed to succeed the opposing force between the positively energized nuclei of a specific isotope. Fusion doesn't release dangerous toxins like co2 or other greenhouse gases into the environment. Its significant by-product is helium: an inactive, non-toxic gas. No long-lasting radioactive ruin: Nuclear fusion reactors generate no high action, long-lived nuclear ruin.
Answer:
repel
Explanation:
its called electrostatic repulsion
conserving fuel is important because burning fuel * 4 points affects the environment. damages the engine. is dangerous in large amoints. is necessary only for long trips.
Answers
Conserving fuel is important because burning fuel adversely affects the environment.
How burning fuel affect our environment?When fossil fuels are burned, they release large amounts of carbon dioxide which is a greenhouse gas into the surrounding environment. Greenhouse gases trap heat in the atmosphere that is responsible for global warming. Due to this burning of fuel, a large number of glaciers start melting which leads to drowning of coastal areas and large number of floods.
So we can conclude that Conserving fuel is important because burning fuel adversely affects the environment.
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Find the electric field inside a hollow plastic ball of radius r that has charge q uniformly distributed on its outer surface. Give your answer as a multiple of q/ε0.
Answers
There is no electric field inside a hollow plastic ball of radius r that has charge q uniformly distributed on its outer surface.
What is Gauss Law?The hollow plastic ball has no electric field inside of it.
There is no charge inside the ball because the charge is only present on the ball's surface.
Gauss's Law
The total charge contained by a closed surface is equal to Q/0 times the electric flux out of the surface, according Gauss's Law. According to mathematics, the electric flux is the result of the electric field E and the surface area A, and is represented as follows:
Electric field E thus equals zero.
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6. What force causes the convection cell to turn down at point C?
Answers
Describe a light wave and explain how light wave travel through solids liquids and gasses
Answers
De manera individual subraya la respuesta correcta: A) El Método Científico de la física experimental y su búsqueda de respuestas tiene un principio básico que es: a. La ciencia. b. Una pregunta. c. La objetividad. d. El conocimiento.
Answers
Answer:
a. La ciencia.
Explicación:
El método científico de la física experimental y su búsqueda de respuestas tiene un principio básico que es la ciencia. La ciencia es la aplicación del conocimiento del mundo natural y social siguiendo una metodología sistemática basada en evidencias. Sin evidencias no hay aceptación de la observación ni se debe hacer teoría porque la evidencia es el principal criterio para aceptar o rechazar una hipótesis.
the left hand should be positioned at 12 o'clock and the right hand should be positioned at 5 o'clock of the steering wheel. a. true b. false
Answers
It is false to say that the right hand should be at 5 o'clock and the left hand should be at 12 o'clock on the steering wheel.
Regardless of which way they're turning, the NHTSA advises drivers to use the areas of the steering wheel between "11 and 8 o'clock" with their left hand and "1 and 8 o'clock" with their right.
Injury prevention is aided by using the push/pull or hand-to-hand steering techniques.
Should you place your hands at 10 and 2?holding the wheel with one hand
Retract your hands. You presumably learned to hold onto the steering wheel with your hands around 10 and 2 o'clock. The National Highway Traffic Safety Administration (NHTSA) currently suggests that drivers place their hands at 9 and 3 o'clock.
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What are Prevailing Westerlies? a Calm area with rising air b Wind blowing West to East away from horse latitudes c Wind blowing East to west away from horse latitudes d Air being blown away from the poles
Answers
Answer:
b Wind blowing West to East away from horse latitudes
Explanation: prevailing Westerlies are winds which blows away from the horse latitudes, this type of wind blow towards the poles between latitude 30 degrees to latitude 60degrees.
Prevailing Westerlies are known to be strongest in the winter months in the and weakest in the summer months
They are also very strong when the pressures are low over the poles and also very weak when the pressures are high over the poles.
In order to change a 2.15 kg handcart's velocity from 1.2 m/s
east to 1.8 m/s east, what's the magnitude of the impulse that
should be applied to the handcart?
a
38.7 N-s
b 12.9 N-S
2.58 N-S
d 3.87 N-s
e
1.29 N.S
Answers
Answer: E 1.29 N•s
Explanation: math
If the total mechanical energy of the system is 100 J: Where does the pendulum have 100 J of kinetic energy? Where does the pendulum have 100 J of potential energy? (Label both points.)Where does the pendulum have 50 J of potential energy? (Label both
Answers
Answer:
See image and explanation
Explanation:
A simple pendulum consists of a string to which a bulb is attached and the string is tied to a support. The string swings from one end to the other as shown.
At the both ends, the energy of the pendulum is all potential. Hence we have 100J potential energy at both ends.
When the pendulum is in motion, the energy is all kinetic at the center of motion. Hence at that point, we have 100J kinetic energy.
In between both extremes the energy is both kinetic and potential as shown. The total energy is this a summation of the two.
Answer:
A simple pendulum consists of a string to which a bulb is attached and the string is tied to a support. The string swings from one end to the other as shown.
At the both ends, the energy of the pendulum is all potential. When the pendulum is in motion, the energy is all kinetic at the center of motion.
In between both extremes the energy is both kinetic and potential as shown. The total energy is this a summation of the two.
two skateboarders of mass 50 kg and 60 kg push each other with force 70N.what is the acceleration of each skaters.step by step.
Answers
Answer:
f=ma
f=70N
m1=50kg
m2= 60kg
a1= f/m
a1= 70/50
a1= 1.4N/kg
a2= 70/60
a2=1.17N/kg
a 50 kg block is pulled from rest by a force of 1000 n at 37° across a horizontal rough surface over a distance of 5.6 m. the coefficient of kinetic friction between the block and the surface is 0.5
Answers
The work done by F is 4472.4J.The work done by the normal force is 0J.The work done by the gravitational force is 0J.The friction force is ineffective as the object is not in contact with surface.
What is work done?The energy that is transmitted to or from an object when a force is applied along a displacement is referred to as work in physics.In its simplest form, it is usually explained as the result of force and displacement. Positive work is the term for the component of a force that moves the point of application when it is applied. A force is said to do negative work if, at the point of application, one of its components points in the opposite direction of the displacement. Work is a scalar quantity, hence it only has magnitude and no direction. Through work, energy is transported from one place or one form to another.
Calculations:
a)
d = distance travelled = 5.6 m
Work done by the applied force F is given as,
Wa = F d Cos\theta = (1000) (5.6) Cos37 = 4472.4 J
b)
Work done by the normal force Fn is given as,
Wn = Fn d Cos90 = Fn (5.6) Cos90 = 0 J
c)
Work done by the gravitational force "mg" is given as,
Wg = mg d Cos90 = mg (5.6) Cos90 = 0 J
d)
Using the equilibrium of force in vertical direction,
Fn + F Sin\theta = mg
Fn + 1000 Sin37 = 50 x 9.8
Fn = - 111.82 N
Frictional force will be ineffective since the object is not in touch with the surface and normal force is negative.
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The peregrine falcon can reach speeds up to 107 m/s during a dive, how much time does it take the falcon to reach prey that is 1500 meters away?
Answers
mercury shows fester increase in temperature than water on heating
Answers
Answer:
Mercury shows faster increase in temperature than water on heating because the mercury has less specific heat capacity than water.
The specific heat capacity is defined as the amount of heat to required by a mass of a material to make a unit change in its temperature. Mercury has less specific heat capacity and shows immediate changes in the temperature. Because of this mercury is used in thermometers and not water.
your physics class is conducting an experiment on the energy exchange between colliding objects. you and your classmates have identical materials and are experimenting with identical conditions. you perform three trials, and your data is different in each trial. you compare results with your peers and find that everyone has different data.
Answers
The scientific experiment is limited due to common sources of errors.
The use of unreliable measurement equipment is one of the causes of incorrect data . Instrumental, environmental, procedural, and human errors are frequent causes. Depending on how they impact the outcomes, each of these mistakes can either be random or systematic. Additionally, mistakes might be made when capturing observations or data. In doing an experiment on the exchange of energy between colliding objects, something unexpected happened.
In this experiment, the observation technique or the equipment used to record the data are wrong, which gives us false findings, leading us to the conclusion that the scientific experiment is constrained by the usage of the same observation technique and instrument.
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Science: due in 5 minutes plz help me!
just in 2-5 sentences is ok Thank you!!!
Answers
Answer:
Explanation:
When the sun rises every morning, it brings light and heat into earth. Plants need energy to live, so they convert the sun's light into chemical energy. (photosynthesis). Then animals eat those plants. Without the sun, we would not have any food, and very little sources of light.
A porg (bird like creature) has an acceleration of 1.2 m/sec/sec, to the right. The animal is moving at 0.8 m/sec to the
5.0 seconds later, it is moving at 6.8 m/sec to the right. Calculate the porg's average speed.
Answers
The Average Speed of the Porg is 3.8 m/s.
Let us say that the initial speed is u which is equal to 0.8 m/s and the final speed of the porg to be v which is equal to 6.8 m/s.
The total time period of the motion is given to us as 5 seconds. Let us represent the acceleration of the body as a, acceleration of the body given is 1.2m/s².
Here since the direction of the motion is not changing and the acceleration is constant, we can use the kinematic equations of motion.
Let say that the body covers distance d in 5 seconds.
To find the distance covered by the body we will use the equation,
v²-u²=2da
Putting all the values,
(6.8)²-(0.8)²²=2(1.2)d
46.24 - 0.64 = 2.4d
45.6 = 2.4d
d = 19m
The distance covered by the porg is 19 meters.
Now let say Average Speed is S.
As we know, the average speed of the body (S) = Total distance covered(d)/total time taken(t)
S = d/t
Average speed = 19/5
Average sped = 3.8 m/s.
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you give a shopping cart a shove down the aisle. The cart is full of groceries and has a mass of 180.0kg. The cart accelerates at a rate of 3.5 m/s². How much force did you exret on the cart?
Answers
The amount of force exerted on a cart that is full of groceries of mass of 180.0kg is 630N.
How to calculate force?The force applied on an object can be calculated by multiplying the mass of the object by the acceleration as follows:
Force = mass × acceleration
According to this question, a cart is full of groceries and has a mass of 180.0kg. The force, if cart accelerates at a rate of 3.5 m/s², can be calculated as follows:
Force = 180kg × 3.5m/s²
Force = 630N
Therefore, the amount of force exerted on a cart that is full of groceries of mass of 180.0kg is 630N.
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vector ????⃗ has a magnitude of 17.9 and its direction is 80∘ counter‑clockwise from the x- axis. what are the x- and y- components of the vector?
Answers
We have vector [tex](17.9*cos80^{0},17.9*sin80^{0})[/tex]
Therefore,
x component = 17.9 * cos80 degree = 3.108
y component = 17.9 * sin80 degrees = 17.628
What is a vector?An object with both magnitude and direction is referred to be a vector. A vector can be visualized geometrically as a directed line segment, with an arrow pointing in the direction and a length equal to the magnitude of the vector. The vector points in a direction from its tail to its head.
If the magnitude and direction of two vectors match, they are the same vector. This shows that if we move a vector to a different location without rotating it, the final vector will be the same as the initial vector. The vectors that denote force and velocity are two examples. The direction of force and velocity are both fixed. The size of the vector would represent the force's strength or the velocity's corresponding speed.
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which of the following is not an electromagnet device
Answers
Answer:
[tex]\textbf {Engine}[/tex]
Explanation:
Electric motor in cars is an example of electromagnetic device.
Please help ASAP! I will give the first answer brainliest!
Answers
Answer:
Sorry for being late. Hope this helps
Explanation:
a 0.240 kg glider moving with a velocity of 0.600 m/s collides head-on with a 0.260 kg glider moving along the same line in the opposite direction with a velocity of 0.200 m/s. the collision is perfectly inelastic. the final velocity of the combined gliders is m/s. group of answer choices 0.0484 0.563 -0.392 none of these 0.184
Answers
the final velocity of the combined gliders is -0.392m/s.
perfectly inelastic collision - It is the process of striking one object to another without conserving the kinetic energy of two object.
m₁ = 0.240 (mass of first glider)
v₁ = - 0.6m/s ( velocity of first glider)
m₂ =0.260 (mass of 2nd glider)
v₂ = 0.2 m/s ( velocity of 2nd glider)
[tex]v_{f}[/tex] = ?
for perfectly inelastic collision
m₁v₁ + m₂v₂ = (m₁+ m₂)[tex]v_{f}[/tex]
[tex]v_{f}[/tex] = m₁v₁ + m₂v₂ /(m₁+ m₂)
[tex]v_{f}[/tex] = [tex]\frac{0.240*(-0.6+0.260*0.2)}{0.240+ 0.260}[/tex]
[tex]v_{f}[/tex] = -0.392 m/s
the final velocity of the combined gliders is -0.392m/s.
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plz help will give brainlest! if you cant help, well, merry christmas!
Fossils are found in:
sedimentary rock
metamorphic rock
sedimentary and metamorphic rock
sedimentary and igneous rock
Answers
most fossils are found in sedimentary rocks
Answer:
Sedimentary rock.
Explanation: