A constant force is applied to a ball of mass m. The velocity of the ball changes from v1 to v2.?

Question

impulse received by the ball is
A) m(v2+v1)
B. m (v2-v1)
C. m (v2squared + v1squared)
2 1 m(v +v).
D. m (v2 squared minus v1 squared)

Answer 1

Impulse = F * (change in time) = m * (change in velocity).

So, m * (v2-v1).

B.

Answer 2

Impulse is the change in momentum. C and D are clearly untrue as both do not have momentum terms (v^2 instead of v). A is not correct as we are not finding the difference of v but rather the sum of v. This makes B correct.