Home
Class 11
PHYSICS
The angula speed of a fly-wheel making ...

The angula speed of a fly-wheel making 120 revolutions /minute is :

A

`4pirads^(-1)`

B

`4pi^(2)rads^(-1)`

C

`pirads^(-1)`

D

`2pi" rad "s^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
A
`omega=2pin`
Angular speed of flywheel=`(120xx2pi)/(60)(rad)/(s)impliesomega=4pirads^(-1)`
Promotional Banner

Topper's Solved these Questions

  • SOLVED PAPER -16 (UNSOLVED)

    FULL MARKS|Exercise PART-II|9 Videos

  • SOLVED PAPER -16 (UNSOLVED)

    FULL MARKS|Exercise PART-III|9 Videos

  • SAMPLE PAPER-5 (SOLVED)

    FULL MARKS|Exercise PART-IV|10 Videos

  • SOLVED PAPER 12 (UNSOLVED)

    FULL MARKS|Exercise Part - IV|10 Videos

Similar Questions

Explore conceptually related problems

A boy is seated in a revolving chair revolving at an angular speed of 120 revolutions per minute. Two heavy balls form part of the revolving system and the boy can pull the balls closer to himself or may push them apart. If by pulling the balls closer, the boy decreases the moment of inertia of the system from 6 kg-m^2 to 2 kg-m^2 what will be the new angular speed?

A body of mass 10 mg revolves in a circle of diameter 0.40m . making 100 revolutions per minute . Calculate its linear velocity and centripetal acceleration.

A bicycle is resting on its stand in the east - west direction and the rear wheel is rotated at an angular speed of 100 revolutions per minute. If the length of each spoke is 30.0 cm and the horizontal comonet of the earth's magnetic field is 2.0 X 10^(-5) T , find the emf induced between the axis and the outer end of a spoke. Neglect centripetal force acting on the free electrons of the spoke.

Calculate the angular velocity in rad/sec. of a fly wheel making 300 rpm .

The angular displacement theta radians of a fly wheel varies with time t seconds and follow the equation theta = 9t^(2) - 2t^(3) . Determine the angular velocity and acceleration of the fly wheel when time t =1 seconds and (ii) The time when the angular acceleration is zero.