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Two identical balls A and B having velocities of 0.5 m/s and –0.3 m/s respectively collide elastically in one dimension. The velocities of B and A after the collision respectively will be:
A
–0.3 m/s and 0.5 m/s
B
0.3 m/s and 0.5 m/s
C
–0.5 m/s and 0.3 m/s
D
0.5 m/s and –0.3 m/s
Explanation
Equal masses in an elastic head-on collision exchange velocities.
Detailed Solution
Since both bodies are identical and the collision is elastic, the velocities are interchanged after collision.
$v_A = -0.3$ m/s and $v_B = 0.5$ m/s
$v_A = -0.3$ m/s and $v_B = 0.5$ m/s