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Physics - Center of Mass Question with Solution | TestHub

PhysicsCenter of MassMomentum conservationMedium2 minQB

PhysicsMediumsingle choice

There is no friction between ground and plank but friction is present between block and plank. The common velocity of system after slipping stops is :

Source diagram: m at 5 m/s on 2m plank at 2 m/s

Options:

Answer:

Solution:

The ground exerts no horizontal friction, so horizontal momentum is conserved.

$m (5) + (2 m) (2) = (m + 2 m) v$

$9 m = 3 m v$

$v = 3 m/s$

Option A.

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

⏱ 2mℹ️ Source: QB

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