Question

Part 1/2

4kg 1kg 3kg 2kg 2kg 3kg 1kg
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Each of the four identical carts above is loaded with a total mass of 4 kilograms. All of the carts are initially at rest on the same level surface. Forces of the same magnitude directed to the right act on each of the carts for the same length of time. If friction and air resistance are negligible, which cart will have the greatest velocity when the forces cease to act.

<The answer is all four carts will have the same velocity. > But why

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