Work Energy And Power Question 114

Question: Two bodies having same mass 40 kg are moving in opposite directions, one with a velocity of 10 m/s and the other with 7m/s. If they collide and move as one body, the velocity of the combination is [Pb. PMT 2000]

Options:

A) 10m/s

B) 7m/s

C) 3m/s

D) 1.5m/s

Show Answer

Answer:

Correct Answer: D

Solution:

By the conservation of momentum 40×10+(40)×(7)=80×v

therefore v=1.5m/s



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