Question

A stationary ball weighing 0.25 kg acquires a spe
of 10 m/s when hit by a hockey stick. The impuls
imparted to the ball is :
A0.25 N×s
B2.5 Nxs
C. 2.5N ×s
D0.5 Nxs

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Answer 1

Answer:

simple refer hc verma for clarification

Answer 2

Answer:

2.5 Ns.

Explanation:

We know that the impulse is the change in momentum of the body hence we can write its formulae as impulse i = small change delta multiplied by momentum. Or we can say a small change in the momentum.

Now, from the question we know that the initial momentum of the body is zero while the final momentum of the body is m*v where m is the mass of the body and v its velocity. So i= 0.25*10 = 2.5 Ns.