The chart lists the masses and velocities of four objects.

Which object requires the greatest change in momentum in order to stop its motion?

Answer

Z

A 40 N crate rests on a rough horizontal floor. A 12 N horizontal force is then applied to it. If the coecients of friction are μs=0.5 and μk=0.4, the magnitude of the frictional force on the crate is:

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Dark matter has been detected by its

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