JEE Main 2026 · 6 Apr · Shift 2 · Physics Q44

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PhysicsSingle correct+4 / -1Question 44 of 75

The velocity at which 6 kg mass (shown in figure) strikes the ground when it is released from a height of 6 m above the ground is ________ m/s. Assume pulley is massless and string is light and inextensible. (Take $g=10$ m/s²)

A pulley hung from the ceiling by a rod; a string over it holds a 6 kg block on the left, 6 m above the ground, and a 2 kg block on the right resting on the ground.

7.74

7.20

6.55

4.50

Answer and worked solution

Official answer: A

Acceleration.
$a=\frac{(6-2)g}{8}=5\text{ m/s}^2.$

Speed after 6 m. $v=\sqrt{2\times5\times6}=\sqrt{60}\approx7.74$ m/s.

(A)

Topics:Constraint motion and pulleys Motion in a straight line

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JEE Main 2026 · 6 Apr · Shift 2, Physics question 44