A bullet of mass 20g has...|RECTILINEAR MOTION|JEE-Main 2019

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JEE MAIN 2019

10-04-2019 S2

Question

A bullet of mass 20 g has an initial speed of $1 \mathrm{~ms}^{-1}$, just before it starts penetrating a mud wall of thickness 20 cm . If the wall offers a mean resistance of $2.5 \times 10^{-2} \mathrm{~N}$, the speed of the bullet after emerging from the other side of the wall is close to :

Select the correct option:

A

$0.4 \mathrm{~ms}^{-1}$

B

$0.7 \mathrm{~ms}^{-1}$

C

$0.3 \mathrm{~ms}^{-1}$

D

$0.1 \mathrm{~ms}^{-1}$

✓ Correct! Well done.

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Solution

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