JEE PYQ: Motion In One Dimension Question 28
Question 28 - 2019 (10 Apr Shift 2)
A bullet of mass 20g has an initial speed of 1 ms$^{-1}$, just before it starts penetrating a mud wall of thickness 20 cm. If the wall offers a mean resistance of $2.5 \times 10^{-2}$ N, the speed of the bullet after emerging from the other side of the wall is close to:
(1) 0.1 ms$^{-1}$
(2) 0.7 ms$^{-1}$
(3) 0.3 ms$^{-1}$
(4) 0.4 ms$^{-1}$