- #1

jwxie

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## Homework Statement

Is more work done on a large or a small mass?

## Homework Equations

F = d/dt (mv)

W = Fd

## The Attempt at a Solution

Greater the mass, greater the velocity according to F = d/dt (mv)

If the problem is given that

a glider of mass is free to slide along a horizontal air track

one asks this given question, should one consider that, since motion only exists in the x-direction, so the mass is an independent clause? Does this sounds right?

I mean in momentum, when a small mass hits a larger mass, we see the smaller mass moves at a greater velocity, assuming it is elastics.

However, when I look at W = E (mechanical energy) and KE, if the system is conservated with no external force, we always cancel out m (mass).But how come the answer is "no difference"?