JEE Main 2022 · 27 Jul · Shift 2 · Physics Q35

← JEE Main 2022 · 27 Jul · Shift 2

PhysicsSingle correct+4 / -1Question 35 of 90

The velocity of the bullet becomes one third after it penetrates 4 cm in a wooden block. Assuming that bullet is facing a constant resistance during its motion in the block. The bullet stops completely after travelling at $(4+x)$ cm inside the block. The value of $x$ is :

2.0

1.0

0.5

1.5

Answer and worked solution

Official answer: C

Deceleration. $\frac{u^2}9=u^2-2a(4)$ gives $a=\frac{u^2}9$ .

Stopping distance $\frac{u^2}{2a}=4.5$ cm, so $x=0.5$ .

(C)

Topics:Work-energy theorem Motion in a straight line

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JEE Main 2022 · 27 Jul · Shift 2, Physics question 35