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MCAT Physics Question — Impulse

What always corresponds to impulse?

I. change in momentum, mΔv
II. product of force applied and duration of applied force, FΔt
III. change in kinetic energy

 

a) I only

b) I and II only

c) I and III only

d) I, II, and III

Explanation

Impulse refers to change in momentum, as well as the product of force applied and the duration of the applied force.

a) I only, incorrect, I and II are correct.

b) I and II, correct.

c) I and III, incorrect, Kinetic energy change does not characterize impulse.

d) I, II, and III, incorrect, See c).

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