Work Energy And Power Question 171

Question: A body of mass 40kg having velocity 4 m/s collides with another body of mass 60kg having velocity 2 m/s. If the collision is inelastic, then loss in kinetic energy will be [Pb. PMT 2001]

Options:

A) 440 J

B) 392 J

C) 48 J

D) 144 J

Show Answer

Answer:

Correct Answer: C

Solution:

Loss in kinetic energy $ =\frac{1}{2}\frac{m_1m_2{{(u_1-u_2)}^{2}}}{m_1+m_2}=\frac{1}{2}( \frac{40\times 60}{40+60} ){{(4-2)}^{2}} $

$ =48Joule $



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