Home
Class 12
PHYSICS
The radius of gyration of a flywheel is ...

The radius of gyration of a flywheel is (3/π ) m and its mass is 1 kg. If the speed of the flywheel is changed from 20rpm to 60 rpm, then the work done would be

A

16 J

B

12 J

C

24 J

D

32 J

Text Solution

Verified by Experts

Promotional Banner

Similar Questions

Explore conceptually related problems

A disc of moment of inertia 9.8/(pi^2)kgm^2 is rotating at 600 r.p.m. If the frequency of rotation changes from 600 r.p.m. to 300 r.p.m., then what is the work done? A. 1470J B. 1452J C. 1567J D. 1632J

A body of moment of inertia 3 kg m^2 is at rest, if it is rotated for 20s with moment of force 6 Nm, then the work done will be

A chain of 100 links is 1 m long and has a mass of 2 kg. With the ends fastened together it is set rotating at 3000 rpm. Then centripetal force on each link is

Mass of a vehicle is 1500 kg. While ascending on a road, its speed decreases from 72 km/hr to 36 km/hr. How much is the work done?

A fly wheel is in the form of solid circular wheel of mass 72 kg and radius of 0.5 m and it makes 70 rpm, then the energy of revolution is

An automobile moves on a road with a speed of 54 km h^-1 . The radius of its wheels is 0.45 m and the moment of inertia of the wheel about its aXIIs of rotation is 3 kg m^2 . If the vehicle is brought to rest in 15s, the magnitude of average torque transmitted by its brakes to the wheel is

A body of mass 5 kg is lifted through a height of 20 m. Calculate the work done by the applied force.

A train approaching a station reduces its speed from 180 km/hr to 90 km/hr. If the mass of the train is about 20,000 kg then how much is the work done by the train?

A horizontal disc is freely rotating about a vertcal axis passing through its centre at the rate of 125 r.p.m. A blob of wax of mass 50 gm falls on it and sticks to it at a distance of 10 cm from the axis. If the reslting frequency of rotation is 75 r.p.m, calculate the moment of inertia of the disc.

A body of mass 2kg and radius of gyration 0.5 m is rotating about an axis. If its angular speed is 2 rad/s, then the angular momentum of the body will be