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A 2.0 g particle moving at 5.6 m/s makes a perfectly elastic head-on collision with a...

A 2.0 g particle moving at 5.6 m/s makes a perfectly elastic head-on collision with a resting 1.0 g object.

(a) Find the speed of each after the collision.

2.0 g particle m/s
1.0 g particle m/s

(b) Find the speed of each particle after the collision if the stationary particle has a mass of 10 g.

2.0 g particle m/s
1.0 g particle m/s

(c) Find the final kinetic energy of the incident 2.0 g particle in the situations described in (a) and (b).

KE in part (a) _____J
KE in part (b) _____J

In which case does the incident particle lose more kinetic energy?

case (a)

case (b)    

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