Work Energy And Power Question 174
Question: Two bodies of masses 0.1 kg and 0.4 kg move towards each other with the velocities 1 m/s and 0.1 m/s respectively, After collision they stick together. In 10 sec the combined mass travels [Pb. PET 2003]
Options:
A) 120 m
B) 0.12 m
C) 12 m
D) 1.2 m
Show Answer
Answer:
Correct Answer: D
Solution:
Velocity of combined mass, $ v=\frac{m_1v_1-m_2v_2}{m_1+m_2} $ = $ \frac{0.1\times 1-0.4\times 0.1}{0.5}=0.12\ m/s $
Distance travelled by combined mass = $ v\times t= $ 0.12 × 10 = 1.2 m.
