Question

Why does a moving object come to a stop on a frictional surface?
A. The object’s kinetic energy is transformed into mainly heat energy.
B. The object’s potential energy is transformed into mainly kinetic energy.
C. The object loses all its energy in deformation.
D. The object’s kinetic energy is transformed into mainly potential energy

Answer 1

Um I don't think this is math but is it physical science?

Answer 2

Well, lets look at the problem (also this is not exactly in the correct section)

Answer 3

i think its A

Answer 4

It helps to apply the problem to a common example- in this case imagine a cube being moved across a surface

Answer 5

yes A

Answer 6

It's not C and I dont think B

Answer 7

A appears to be the correct answer, but lets look at why the others are incorrect.

Answer 8

Deformation is hwen the object deforms or changes shape so not C.

Answer 9

C is incorrect because an object's deformation is not going to affect its motion in the constraints of this problem.

Answer 10

B is incorrect because an increase in kinetic energy (the energy of motion) would correspond to the object continuing to move, as opposed to slowing down and stopping.

Answer 11

it can't be B althugh it might have some PE - it slows down to stop so all of the KE is used up

Answer 12

The potential energy is not where the kinetic energy is being transferred in this problem though- assuming a level surface (which I think the problem implies, were not going up a ramp or anything)

Answer 13

so it is a you guys are way better than the physics department i ask a question and no one never answers

Answer 14

Yes, the correct answer is A. That being said, I would try in the future to ask questions in the proper area, especially as they get more difficult- we might not be the best soure of information. Good luck with your work!

Answer 15

thank you so much @VostheBoss321 @cwrw238 @WiseOlMoosey @souvik

Answer 16

no prob!

Answer 17

Glad to help :) Do well!