Start Free Mock LoginAlready registered? Login here

Physics - Center of Mass Question with Solution | TestHub

PhysicsCenter of MassMomentum conservationMedium3 minQB

PhysicsMediumsingle choice

A small block of mass m is placed on a long plank of mass M that is placed on a frictionless horizontal floor. The block is abruptly given a velocity u on the plank. If during sliding of the block a distance L relative to the plank, total heat loss is Q, find acceleration of the plank during the sliding of the block?

Options:

Answer:

Solution:

Heat generated = friction force × relative sliding distance: $Q = f L \Rightarrow f = \frac{Q}{L}$ . Plank's acceleration $= \frac{f}{M} = \frac{Q}{M L}$ . Answer: (B)

Stream:JEESubject:PhysicsTopic:Center of MassSubtopic:Momentum conservation

⏱ 3mℹ️ Source: QB

Doubts & Discussion

Loading discussions...