+1 vote
in Machine Kinematics by (38.0k points)
A sphere of mass 25 Kg is moving at a speed of 1.5 m/s undergoes collision with another sphere of mass 50 Kg moving at 3m/s in the same direction, find the velocity of 25 Kg mass in m/s after collision when the collision is inelastic with e = 0.6.

(a) 2.5

(b) 2.00

(c) 3.5

(d) 3.1

This question was addressed to me in quiz.

The query is from Loss of Kinetic Energy During Elastic Impact topic in portion Kinematics & Kinetics of Motion of Machine Kinematics

1 Answer

0 votes
by (106k points)
Correct choice is (d) 3.1

To explain I would say: Velocity during elastic collision is given by

m1u1 + m2u2/(m1+ m2) = v

substituting the values we get

V = 2.5 m/s

v2 = 2(1+e)V – eu2

v2 = 3.1 m/s.

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