A 15 kg box sits still on a rough inclined plane (no math required here).
Why isn’t the box sliding down the hill?
Answers
Answer:
Explanation:
The force of friction equals the sine component of the force due to gravity
Related Questions
What is kinetic energy
Answers
Answer:
Kinetic energy, form of energy that an object or a particle has by reason of its motion. ... Kinetic energy is a property of a moving object or particle and depends not only on its motion but also on its mass.
Credits to britannica.com
Explanation:
Hope this helps
Kinetic energy of an object is the energy that it possesses due to its motion.
Which of the following best demonstrates Newton's Third Law?
Question 3 options:
The harder you kick a soccer ball, the faster it accelerates
An object sitting on the ground will stay there until somebody or something pushes it
Wearing a seatbelt prevents you from continuing to move when the car has stopped
When you walk your foot pushes down on the ground while the ground pushes back on your foot
Answers
Answer:
when you walk your foot pushes down on the ground, while the ground pushes back on your foot
Explanation:
it was another brainly question, Goodluck :)
9. Peter drove 57 miles down the coastline in 3 hours. What was his
average speed? (6.8C)
O 171 mi/h
O 50 mi/h
O .05 mi/h
O 19 mi/h
Answers
Which is the main purpose of an experimental conclusion?
O A. to describe the steps in an experiment
O B. to state whether a hypothesis has or has not been
supported
O C. to criticize the observations that led to the investigation
O D. to explain how data was collected
Answers
Answer:
the Answer is B
because the purpose of experimental conclusion it is to prove rather is a right or wrong is a hypothesis is right or wrong
A toy car is allowed to roll down a ramp during an experiment. While it is on the ramp, gravity acts on the car as an unbalanced force. Which of the following graphs best illustrates the car’s velocity as a function of time while it is on the ramp?
Answers
Answer:
When an unbalanced force acts on an object, the motion of the object is changed. If the object is at rest, the force makes it move. If the object is in motion, the force changes its velocity. Any change in velocity is acceleration
Explanation:
jayfeather friend me
Please explain in detail and step by step
Answers
Explanation:
Irfan should take care that the mirror has to be 1/2 of his height and it is
there is not any other specification to be looked at and irfan's height is 180 cm
What happens to kinetic energy when potential energy increases?
Answers
On the way home from school, you notice the speedometer on the car is at 5,200 miles. When you get home, the speedometer reads 5,208 miles. With only this information what value could you calculate?
O Velocity
O Displacement
O Acceleration
O Distance
Answers
Answer:
O Distance
Explanation:
With the given information, it is possible to find the distance of the car has traveled on the home from school.
This is possible because distance is the length of path a body covers.
From the given values:
Distance = 5208 - 5200 = 8miles
It is not possible to find the displacement because no direction was given.
Also velocity is not possible since the time frame of travel was not state.
Which of the following does not describe when something has acceleration?
Changes in displacement
Changes in speed
Changes in direction
Changes in speed and direction
Answers
Answer:
changes in displacement
Explanation:
Explain the centripetal force or Newton's second law...
Answers
Answer: a centripetal force is toward the center of curvature, the same as the direction of centripetal acceleration. According to Newton's second law of motion, net force is mass times acceleration: net . For uniform circular motion, the acceleration is the centripetal acceleration
Explanation:
Centripetal force is the force which causes the change in direction of velocity towards the center of the circular motion of an object.
What is Centripetal Force?Centripetal force is any kind of force which causes a change in the direction of velocity of an object which is moving towards the center of the circular motion. The component of this force which is perpendicular to the velocity of the object is the part which results in the centripetal force.
The force of gravity which acts up on a satellite in the orbit is an example of a centripetal force. The friction of the tires of a car which makes a turn that is similarly provides centripetal force on the car.
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in what way is Speed related to Kinetic Energy?
Answers
Answer:
Explanation:
In order to find kinetic energy, you need information about the velocity. Speed is the magnitude of the velocity.
Kinetic energy is 1/2mv^2
m being mass
v being velocity
The kinetic energy of an object is directly proportional to the speed of the object. If we double the speed of the object then the kinetic energy of the object will increase by a factor of four or four times.
What is Kinetic energy?Kinetic energy is the energy which is present in an object which has because of its motion. If we want to accelerate an object, then we must apply the force of some magnitude. Applying a force, requires us to do some work. After the work has been done, then the energy has been transferred to the object, and the object will be moving with a new constant speed.
Kinetic energy is directly proportional to the mass of the object and to the square of its speed or velocity:
K.E. = 1/2 m × v²
If the mass has the units of kilograms and the velocity of meters per second, then the kinetic energy has units of kilograms-meters squared per second squared.
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A car advertisement states that a certain car can selerate from rest to 20 m/s in 7 seconds. Find the car's average acceleration
Answers
Answer:
2.86m/s²
Explanation:
[tex]\boxed{average \: acceleration = \frac{change \: in \: velocity}{time} }[/tex]
Car's average acceleration
[tex] = \frac{20 - 0}{7} \\ = 2.86 \: m/ {s}^{2} \: (3 \: s.f.)[/tex]
The reason why the change in velocity over time is average acceleration is because we are finding the total difference in velocity and dividing it against the total duration. This means that the acceleration of the car can vary throughout the 7 seconds (may not be a constant acceleration) but on average, the car's acceleration 2.86m/s², to 3 significant figures.
Change in velocity
= v -v₀
= final velocity -initial velocity
Since the car is at rest at the beginning, the initial velocity (v₀) is 0m/s.
Answer:
Given :-Acceleration = 20 m/sTime = 7 secTo Find :-Average acceleration
Solution :-As we are already knowing that
[tex] \sf Acceleration_{Avg} [/tex] = TA/T
TA = Total acceleration
T = Time
A = 20/7
A = 2.85 m/s²
isss in the pic pls help
Answers
Answer:
reacts with metals: acid
reacts with nonmetal: base
taste sour: acid
can cause burns: both
conduct electricity: both
taste bitter: base
An employee was watching Jessica, an IT employee, typing in many different confusing terms. Jessica explained that she needed to fix the code and test a couple of programs before she could train the employee on how to use the software. Which IT career would be responsible for these tasks?
Network Systems
Programming and Software Development
Information Support and Services
Interactive Media
Answers
Answer:
B.) Programming and Software
Explanation:
Answer on Edge
Answer:
its B
Explanation:
Within a few sentences, explain the difference between meiosis and mitosis.
Answers
Mitosis and meiosis are both processes which describe the production of new cells. Mitosis produces 2 daughter cells which are genetically identical to the parent cell. Each daughter cell is diploid (contains the normal number of chromosomes). This is the result of DNA replication and 1 cell division. Mitosis is used in growth and asexual reproduction. Meiosis produces 4 daughter cells, each of which are unidentical to the parent cell and to one another. Each daughter cell is haploid (contains half the number of normal chromosomes). This is the result of DNA replication, followed by crossing over of homologous chromosomes and separation of chromosomes. There are two cell divisions: the parent cell divides once and then each cell produced by this first division divides once. Meiosis is used to produce gametes (sperm and egg cells), the cells of sexual reproduction. Two gametes fuse to form a zygote, a diploid cell with the full number of chromosomes.
Example of electrical to sound? And explain how the energy is changing forms?
Answers
microphone for example
What is the weight on Earth of a girl with a mass of 32 kg (F = ma)?
Answers
Answer:
~ 314 N
Explanation:
F = ma
= 32 ( 9.81) = ~ 314 N
Help me plz. I'll mark brainiest
Answers
Answer:
I'm pretty sure question one is D. Anatomy and physiology
Explanation:
normally you'd have to learn about Physiology before you move on to therapy from my knowledge...
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Answers
Select the correct sequence of steps for lighting a Bunsen burner?
A. Apply the spark above the barrel of the Bunsen burner.
B. Open the gas adjustment at the base of the Bunsen burner.
C. Connect the burner hose to the gas outlet.
D. Open the gas valve on the gas outlet
D. C, A, B
C, A, D, B
C, D, A, B
C, D, B, A
Answers
Answer:
CDBA
Explanation:
Just did it on Study island
The correct sequence of steps for lighting a Bunsen burner would be C, D, B, A, therefore the correct answer is option D.
What is thermal energy?Thermal energy sometimes referred to as heat energy, may be described as the type of energy in which heat is transmitted from one body to another body as a result of their molecular motions.
The following would be the proper procedure for lighting a Bunsen burner:
Link the gas outlet and the burner hose.
The gas output valve should be opened.
Open the Bunsen burner's base-mounted gas adjustment valve.
The Bunsen burner's barrel should be covered with the spark.
Thus, the right response is option D since the proper stages to ignite a Bunsen burner are C, D, B, and A.
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If two forces are acting on an object , one is 25N west, and the other is 50N east. Calculate the net force.
Answers
Answer:
Explanation:
Since the forces are only in the x-direction, you could just add the two forces. The West is to the left, so it would be -25N with the negative sign indicating direction. The East is to the right, so that would be +50N.
50 + (-25) = 25N to the right or the positive i-hat direction
What is the net force on this box?
100 N
80N
90 N
110
100 N
Answers
Answer:
where is the box? how can we answer if your question is lack given? how do we know what box is it your talking about
Vivian went on a bicycle trip through Germany with her family. One afternoon, she rode her bicycle along a long flat road at a constant speed for 24 kilometers (km). The ride took her 1.2 hours (h). At what speed did she ride her bicycle?
Answers
Answer:
20km/h
Explanation:
Given parameters:
Distance moved = 24km
Time = 1.2hrs
Unknown:
Speed of her ride = ?
Solution:
Speed is the distance covered per unit of time.
So;
Speed = [tex]\frac{distance}{time}[/tex]
Speed = [tex]\frac{24}{1.2}[/tex] = 20km/h
Frying an egg conduction convention radiation
Answers
Answer:
frying an egg is conduction because the pan is touching the stove and the pan is touching the eggs
Explanation:
how many molecules is in this formula 3H2O
Answers
Answer: There are 9 molecules.
Explanation: 3H2O has 6 hydrogen atoms and 3 oxygen atoms. Heres a diagram.
HHO + HHO + HHO = 3H2O
During the course of a trajectory, is the vertical component of the velocity a constant or a changing value? ___________________ If it is a changing value, then describe its changes (increasing, decreasing, or ...)
Answers
Answer:
1) Changing value
2) The velocity is decreasing for upward motion and increasing for downward motion due to gravitational force
Explanation:
1) A trajectory is the motion of an object which is being acted upon by specified forces. The flight path of an object in projectile motion is its trajectory
During the course of a trajectory, the vertical component of the velocity, [tex]v_y[/tex], is a changing value
2) The vertical component of the velocity first decreases, during the upward motion, according to the following equation;
[tex]v_y[/tex] = [tex]u_y[/tex] - g·t
Where;
[tex]v_y[/tex] = The vertical component of the velocity after a given time, t
[tex]u_y[/tex] = The initial vertical velocity
t = The time of motion of the trajectory
g = The acceleration due to gravity ≈ 9.8 m/s²
When the vertical velocity of the object decreases to zero, which is the point at which the object reaches the maximum height of its motion, the direction of the vertical motion of the object reverses, and object begins to accelerate and increase its velocity downwards according to the following equation;
[tex]v_y[/tex] = [tex]u_y[/tex] + g·t
Therefore, the velocity of the object is decreasing on its way up, and then increasing on its way down.
What is the difference between a chemical change and a physical change? *
A. There is no difference.
B. A chemical change CAN NOT be reversed. A physical change CAN be reversed.
C. A physical change CAN NOT be reversed. A chemical change CAN be reversed.
D. They can both be reversed.
Answers
Answer:
I do belive that it is B hrs cn I an gn
what happens to the brightness of the bulb when the resistor is increased?
Answers
Answer: As the variable resistance increases its resistance, the current which flow through the lamp will decrease and therefore its brightness decreases. ... If the resistors are very large, they have no impact and the lamps will be the same brightness.
Explanation:
Answer:
The intensity or brightness of the bulb increases as more dry cell is added in the circuit.
Explanation:
Hope it helps :)
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Answers
Answer:
your body is exerting a force on the chair and nothing is happening
Explanation:
Answer:
the second one
Explanation:
as you sit down you are using gravitational force which is pulling straight down but as you sit down there are currently no forces in motion while sitting
Please help!!!
What do all of the inventors discussed in this lesson have in common?
All of the inventors can be characterized as problem-solvers.
O All of the inventors created new things as children.
All of the inventors used engineering principles to create new things.
O All of the inventors needed mathematics principles to formulate solutions.
Answers
Answer:
All of the inventors can be characterized as problem-solvers.
Explanation:
Took the practice
Answer:
All of the inventors can be characterized as problem-solvers.
Explanation: