Q. A body at rest explodes into two equal parts. Then,
A) They move with different speeds in different directions.
B) They move with different speeds in same direction
C) They move with same speed in same directions
D) They move with same speed in opposite directions
Explanation
(d) From law of conservation of linear momentum
Total final momentum =Total initial momentum
$m_{1}v_{1} + m_{2}v_{2} = 0$
Here, $m_{1} = m_{2}$
So, $v_{1} = - v_{2}$
So, both parts will move with same speed in opposite directions.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.