+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 common velocity in m/s after collision when the collision is completely inelastic.

(a) 2.5

(b) 9.75

(c) 7.25

(d) 6.75

This question was addressed to me in unit test.

Origin of the question is Loss of Kinetic Energy During Elastic Impact in chapter Kinematics & Kinetics of Motion of Machine Kinematics

1 Answer

0 votes
by (106k points)
The correct choice is (a) 2.5

Explanation: Common velocity during inelastic collision is given by

m1u1 + m2u2/(m1+ m2) = v

substituting the values we get

V = 2.5 m/s

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