Most Important Selected Qs for JEE AdvancedPhysicsMotion in Two Dimensions
On a train moving along east with a constant speed v , a boy revolves a bob with string of length on smooth surface of a train, with equal constant speed v relative to train. Mark the correct option(s).
Options
- AMaximum speed of bob is 2 v in ground frame.
- BTension in string connecting bob is 4 m v^2 at an instant.
- CTension in string is m v^2 at all the moments.
- DMinimum speed of bob is zero in ground frame.
Correct answer
D. Minimum speed of bob is zero in ground frame.
Step-by-step solution
aligned & at t =0 & ~V _ b / g = V i - V j & T= m v^2 aligned