Q.

A steel ball of mass 1 kg, moving with a velocity of 2 m/s collides head-on and elastically with an identical steel ball. What is impulse acting on the second ball during the course of collision?

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a

4 Kg-m/s

b

2.25 Kg-m/s

c

2.5 Kg-m/s

d

2 Kg-m/s

answer is D.

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Detailed Solution

As a result of head-on elastic collision between the identical spheres, the first spheres will stop and the second one will start moving with velocity of 2 m/s.∴ Impulse=1×2 Kg−m/s=2 Kg−m/s
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A steel ball of mass 1 kg, moving with a velocity of 2 m/s collides head-on and elastically with an identical steel ball. What is impulse acting on the second ball during the course of collision?