TestHub
Start Free MockLogin

Physics - Rotation Question with Solution | TestHub

PhysicsRotationMiscellaneousMedium3 minCT47
PhysicsMediuminteger

A 1 m long rod is dropped (keeping it horizontal) from a height of 20 m. The end A of rod collides with end B of a stationary horizontal table. The impact is perfectly elastic. The post impact angular velocity of rod is (in rad/sec.), find value of .

CT47 diagram

Answer:
3
Solution:

Before impact the fall speed is √(2gh)=20 m/s.

Impulse-momentum plus e=1 at end A gives post-impact angular speed 30 rad/s.

Thus 10α=30 and α=3.

Stream:JEESubject:PhysicsTopic:RotationSubtopic:Miscellaneous
⏱ 3mℹ️ Source: CT47

Doubts & Discussion

Loading discussions...