Answers
Answer:
Explanation:
How does a force do negative work on an object ; This is when the direction of motion is opposite to the direction of the force
To solve this we must be knowing each and every concept related to work. Therefore, a force do negative work on an object, when the direction of motion is opposite to the direction of the force.
What is work?A task requiring mentally or physically effort in order to accomplish a goal or outcome is referred to as labor in general. When we lift heavy objects off the ground or push or pull large objects, we are performing labor. When the direction of motion is opposite to the direction of the force, work is negative.
Another word we frequently use is energy. Energy and amount of work performed are typically associated, because a person who's really feeling particularly excited is capable of accomplishing a lot of work.
Therefore, a force do negative work on an object, when the direction of motion is opposite to the direction of the force.
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Related Questions
If it’s a full moon how much of the moon are you actually seeing ?
Answers
Answer:
half of the moon
Explanation:
cause your seeing the front of it
Answer:
The light side of the moon so only half
Explanation:
if you crash your car how could you decrease the damage to you or the car using the concept of impulse
Answers
Explanation:
Crumple zones are sections in cars that are designed to crumple up when the car encounters a collision. Crumple zones minimize the effect of the force in an automobile collision in two ways. By crumpling, the car is less likely to rebound upon impact, thus minimizing the momentum change and the impulse.
If the box moves at a constant velocity, what do you know about the forces acting on the object?
A)The forces are balanced.
B)The forces are unbalanced.
C)The forces are in outerspace
D)The box has friction
Answers
Define Newton's third law:
A) states that forces=m Xa
B)states that all forces occur in pairs
C)states that forces keep moving until acted upon by unbalanced force
D)states that gravity affects all objects
Help please!!
Answers
Answer:
the answer is B
Explanation:
the law states that for every action there is an equal and opposite reaction. action and reaction forces always act on two two different bodies and therefore THEY ALWAYS EXIST IN PAIRS.
The way a rock reflects light is called the rock's
A. streak
O B. luster
O C. cleavage
D. specific gravity
Answers
The way a rock reflects light is called the luster of the rock. Hence option B is the correct answer.
What is Reflection?When light rays bounce off one surface, transition from one transparent medium to the next, or proceed through a media whose structure is constantly shifting, they change direction.
According to the law of reflection, the angle of the reflected ray when reflecting from a level surface is the same as the angle of the ray. (By practice, all angles in wave propagation are expressed with regards to the normal to the surface, or to the line that is perpendicular to it.
The light beam and the surface normally establish a plane in which the reflected beam is always located. The pictures created by straight and curved mirrors can be understood using the
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Which of the following planets helped astronomers locate another planet?
Group of answer choices
Mercury
Uranus
Saturn
Pluto
Answers
Answer: Pluto,Mercury
Explanation:
A wave is traveling from one medium to another.If the wave is partially transmitted an partially reflected from the boundary,what will happen to the amplitude of the reflected wave?
Answers
Answer: the answer is C
Explanation:
A spherical mirror and a thin spherical lens have each a focal length of +10cm , the mirror and the lens are likely to be
Answers
Answer: Concave mirror and convex lens
Explanation: A spherical mirror and a thin spherical lens have each a focal length of +10cm, this means that distance of any object from the mirror is +10 metres.
While for the lens, the distance of any object to the other side of the lens is +10 metres. Therefore, the mirror is concave mirror and the lens is a convex lens.
Help needed.
(1) A small object carrying a charge of
[tex] - 5 \times {10}^{ - 9} \: c[/tex]
experiences a downward force of 10 Newton when placed at a certain point in an electric field
What is the electric intensity at that point.
2. Determine the electric potential due to a charge of
[tex]12 \times {10}^{ - 9} c[/tex]
at a point 6 cm from the charge.
3. A series arrangement of three capacitors of value at 8micro Farahds, 12 micro Farahds and 24 micro Farahds is connected in series with a 90—V battery
(a) Draw and open circuit diagram for this arrangement (b). Calculate the effective capacitance in the circuit
(c) On closed circuit calculate the charge on each capacitor when fully charged
(d) Determine the PD across the 8 micro Farahds capacitors.
Answers
Answer:
1. -2×10 ^-9
2. 1800v
3 (ii) 4micro Farhad
(iii) V = 3.60 ×10²
(Iv) 45v
Explanation:
I hope it helps
The acceleration due to gravity on the Moon is less than the acceleration due to gravity on the Earth. Which of the following is true about the mass and weight of an astronaut on the Moon's surface, compared to Earth?
(A) Mass is less, weight is the same.
(B) Mass is the same, weight is less.
(C) Both mass and weight are less.
(D) Both mass and weight are the same.
(E) Mass is more, weight is less.
Answers
Answer:
(B) Mass is the same, weight is less.
Explanation:
Just took test
Why can a liquid take the shape of the bottom of its container?
Answers
Answer:
Liquids take on the shape of their container because they contain particles that can slide past each other. Particles in a solid,
Explanation:
Answer: Liquids take on the shape of their container because they contain particles that can slide past each other.
the skeletal system serves all the following functions except
Answers
Answer:
The major functions of the bones are body support, facilitation of movement, protection of internal organs, storage of minerals and fat, and hematopoiesis. Together, the muscular system and skeletal system are known as the musculoskeletal system.
your question seems incomplete. Kindly give the full question so that it helps :)
Answer:
D.
producing ligaments and tendons
Explanation:
A machine with a 5-N input force and a 25-N output force has a mechanical advantage of (I point)
02
05.
O20.
O125
Answers
Answer:
020
Explanation:
Curtains over a window are an example of _____. A. transmission B. a medium for light C. how light waves do not require a medium D. a substance that does not transmit a wave
Answers
Answer:
C
Explanation:
we know that light doesn't need a medium through which to travel because the speed of light is experimentally constant: independent of the movement of the source or detector or the direction in which it travels.
Which of the answers shows three examples of a physical change
Answers
When waves travel through water, why do the moving water particles continue to return to their starting position?
OA.
Waves transfer matter, but not energy.
Waves transfer both matter and energy.
OC.
Waves transfer energy, but not matter.
OD.
Waves don't transfer matter or energy.
Answers
Answer:
Waves transfer energy, not matter
Explanation:
At which point is the potential energy the greatest? At which point is kinetic energy the greatest?
Answers
Answer:
Kinetic energy is greatest at the lowest point of a roller coaster and least at the highest point.
hope it helps you make me as brainlylistPotential energy will be greatest at the points A and G, and kinetic energy will be greatest at the point D.
• The energy possessed by an object due to its motion is termed as the kinetic energy. On the other hand, the energy stored within an object because of its position relative to some zero position is known as the potential energy of the object.
• Kinetic energy is highest when the velocity is the highest, in the case of pendulum, this takes place at the bottom. In the given case, that is, at point D.
• If kinetic energy is highest at point D, then at the same point potential energy will be the lowest.
• Therefore, potential energy would be highest at its highest point on each of the side of its motion where it remains stationary for some time, that is, at point G and A.
Thus, kinetic energy would be highest at point D, and potential energy would be highest at the points A and G.
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If a (hypothetical) atom with 30 protons and 44 neutrons undergoes alpha decay:
how many protons will be left in the nucleus?
how many neutrons will be left in the nucleus?
Answers
Answer:
Protons = 28
Neutrons = 42
Explanation:
Alpha decay is one of radioactive decay in which the atomic nuclei can be illustrated by the emission or loss of helium particles of mass number 4 and proton number of 2
Because mass number is the sum of protons and neutrons, If a (hypothetical) atom with 30 protons and 44 neutrons undergoes alpha decay, 28 protons will be left in the nucleus and 42 neutrons will be left in the nucleus.
please i need detailed explanation
Answers
Answer:
2Micro Farahds
Explanation:
Its in the picture.
I Hope it helps.
Which term best describes this step of the investigative process?
question
communication of results
peer review
experiment control
Answers
Answer:
peer review
Explanation:
The investigative process involves the development and inclusion of the steps involved to find an answer or solution to a specific question. Certain steps are followed in the process. The hypothesis is formulated, tested, and modified during the whole process. peer review involves the suggestions, comments, and interpretation of people in similar fields about the hypothesis. The given extract focuses on the investigative process of peer-reviewing. The review of the scientists from different countries has been asked to give their suggestions and advice on the journal before its publication.
A vector points 12.0 units along the x-axis, and 9.00 units along the y-axis. Find the direction of the vector
Answers
The resultant points somewhere between the positive x and y axes.
The angle it makes with the x-axis has a tangent of (9/12) = 0.75 .
That angle is 36.9°, rounded to the nearest tenth of a degree.
So the resultant vector points up and to the right, 36.9° above the x-axis.
Which of the following is an example of a visual aid? A. a poster B. a pair of glasses C. a set of note cards D. a copy of a written report
Answers
Answer:
a pair of glasses
of course
What would a scientist most likely do to demonstrate the effects of a tsunami? (2 points) construct tsunami models make underwater plates move create actual underwater earthquakes take underwater photographs during a tsunami
Answers
Answer:
a - construct tsunami models
Explanation:
scientists cant effect on earthquakes directly, so its not 2 or 3
for 4 it wont help that much to study waves, so its better for them to make model of tsunami waves
What force is required to give an object with mass 2000 kg an acceleration of
3.5 m/s2?
A. 571 N
B. 7000N
C. 10,500 N
D. 2535 N
Answers
Answer:
B
Explanation:
7,000N because the formula for finding force is F=MA (2000x3.5)N=7000N
Which object would have the most kinetic energy?
O A. An elephant sitting at the top of a cliff
B. A sloth hanging from a tall tree
C. A mouse running at 11 km/h
D. A zebra running at 10 km/h
Answers
Answer:
D
Explanation:
Answer:
It is D
Explanation:
Because kinetic energy ALSO depends on mass (weight) so it has to be moving and has to have weight in order to be called kinetic energy.
Which one of the following is not equivalent to 2.50 miles?
(1.00 mi = 1.61 km = 5280 ft, 1.00 yd = 3.00 ft = 12.0 in.)
(A) 1.32 x 104 ft
(B) 1.58 x 105 in
(C) 4.02 x 103 km
(D) 4.40 x 103 yd
(E) 4.02 x 105 cm
Answers
Answer:
Choice C is not equivalent to 2.50 miles.
Explanation:
The given data is now converted into feet, inches, kilometers, yards and centimeters:
mi - ft
[tex]x = (2.50\,mi)\cdot \left(5280\,\frac{ft}{mi} \right)[/tex]
[tex]x = 13200\,ft[/tex]
[tex]x = 1.320\times 10^{4}\,ft[/tex] (Choice A)
mi - in
[tex]x = (2.50\,mi)\cdot \left(5280\,\frac{ft}{mi} \right)\cdot \left(12\,\frac{in}{ft} \right)[/tex]
[tex]x = 158400\,in[/tex]
[tex]x = 1.584\times 10^{5}[/tex] (Choice B)
mi - km
[tex]x = (2.50\,mi)\cdot \left(1.61\,\frac{km}{mi} \right)[/tex]
[tex]x = 4.025\,km[/tex] (Different from Choice C)
mi - yd
[tex]x = (2.50\,mi)\cdot \left(5280\,\frac{ft}{mi}\right) \cdot \left(\frac{1}{3}\,\frac{yd}{ft} \right)[/tex]
[tex]x = 4400\,yd[/tex]
[tex]x = 4.40\times 10^{3}\,yd[/tex] (Choice D)
mi - cm
[tex]x = (2.50\,mi)\cdot \left(1.61\,\frac{km}{mi} \right)\cdot \left(100000\,\frac{cm}{km}\right)[/tex]
[tex]x = 402500\,cm[/tex]
[tex]x = 4.025\times 10^{5}\,cm[/tex] (Choice E)
Choice C is not equivalent to 2.50 miles.
If you wanted to learn more about ancient scientific knowledge, whose life
would you research?
Answers
Answer:
I would like to research Nikola Tesla's life
Which of the following is the best description of the term resultant
displacement?
A. The scalar that joins all the points along the path.
B. The average of all the displacement vectors.
C. The total distance traveled.
O D. The shortest distance from the beginning point to the end point.
Answers
Answer:
D
Explanation:
Displacement refers to the shortest, or straight-line path from one point to another. It is a vector, thus A is incorrect. It is not the average, but rather the sum of all displacement vectors, so B is incorrect. It is not the distance traveled, as some paths have longer distances than others, while leading to the same destination, hence same displacement. (i.e. running around in circles yields positive distance traveled but zero displacement.)
Answer:
Explanation: D
Displacement is a vector. It has direction and it has magnitude. But we are asked for the resultant displacement. You have to use pythagorean theorem. This makes our answer always positive. That essentially means distance, since you did just do the distance formula.
A is wrong because that tells you perimeter
B is wrong because that tells you the midpoint
C is wrong because displacement and distance are two different things. We dont want the distance of the two vectors
D is correct, this perfectly explains the distance formula
Can anyone help me with this question? ASAP
15 points
Answers
Explanation:
PRIMERO ENCUENTRAS LA COMPONENTE x
x = 5.9 m(cos62°) + 7.8 m(cos 29°) = 9.6 m
AHORA LA COMPONENTE y
y = 5.9 m(sen 62°) - 7.8 m(sen 29°) = 1.4 m
PARA ENCONTRAR DESPLAZAMIENTO:
R = [tex]\sqrt{(9.6 m)^{2} + (1.4 m)^{2}}[/tex] = 9.7 m
I am literally so confused on what the question is asking halp :(
Answers
Answer: B
Explanation: Distance/Time but if u want it easier its Velocity=Distance/Time or (Final Velocity -Starting Velocity)/Time