NEET2018PhysicsRotational MotionActual
An elevator starts going up with an acceleration 2 ~m / s ^2 . If radius of the wheel attached to the elevator is 0.1 ~m , then find out number of revolutions in 10 ~s .
Options
- A160
- B170
- C180
- D190
Correct answer
A. 160
Step-by-step solution
=2 n= 1 2 ( ) t^2n= 1 2 ( a r ) t^2 2 Here, a=2 ~m / s ^2, r=0.1 ~m , t=10 ~s , n= ? n= 1 2 ( 2 0.1 ) 10^2 6.28 160