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JEE_MAIN_2021
170321_S1
Question
A boy is rolling a 0.5 kg ball on the frictionless floor with the speed of $20 \mathrm{~ms}^{-1}$. The ball gets deflected by an obstacle on the way. After deflection it moves with 5\% of its initial kinetic energy. What is the speed of the ball now ?
Select the correct option:
A
$19.0 \mathrm{~ms}^{-1}$
B
$4.47 \mathrm{~ms}^{-1}$
C
$14.41 \mathrm{~ms}^{-1}$
D
$1.00 \mathrm{~ms}^{-1}$
✓ Correct! Well done.
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