Question

The motor of an engine is rotating about its Axis with an angular velocity of 120 RPM it comes to rest in 10 seconds after being switched off assuming constant deceleration calculate the number of revolutions made by it before coming to rest

Answer 1

Answer:10

Explanation:

Angular velocity=120 rpm

w=4π

T=10s

α=w/t=0.4π

Angular distance=s=w^2/2α

4π^2/0.8π=6.28

Number of revolutions=6.28/2π=10