Mass m = 0.1 kg moves to the right with speed v = 0.45 m/s and collides with an equal mass initially at rest. after this inelastic collision the system retains a fraction = 0.86 of its original kinetic energy. if the masses remain in contact for 0.01 secs while colliding, what is the average force in n between the masses during the collision?

Explanation:

Let the coefficient of restitution is "e"

so we have

here we have

now we have by momentum conservation

now we have

now we have the ratio of final kinetic energy and initial kinetic energy given as 0.86

so we have

so we have

now change in velocity of first ball is given as

now acceleration of the ball is given as

so the force on the ball during collision is

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object 2 because all the other ones are wrong