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Physics - Kinematics Question with Solution | TestHub

PhysicsKinematics1-DMedium2 minQB

PhysicsMediumsingle choice

The velocities of $A$ and $B$ are marked in the figure-1.130. The velocity of block $C$ is (assume that the pulleys are ideal and the string is inextensible):

Options:

Answer:

Solution:

From the string-length constraint, when $B$ moves left by $x$ and $A$ moves left by $y$ (the pulley on $A$ doubling the string drawn to $2 y$ ), block $C$ descends by $3 x - 2 (2 y)$ . Hence $v_{C} = 3 v_{B} - 4 v_{A} = 3 (3) - 4 (1) = 5$ m/s. Option A.

Stream:JEESubject:PhysicsTopic:KinematicsSubtopic:1-D

⏱ 2mℹ️ Source: QB

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