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 $
