Home
Class 11
PHYSICS
A hoop of radius 2 m weighs 100 kg. It r...

A hoop of radius 2 m weighs 100 kg. It rolls along a horizontal floor so that its centre of mass has a speed of 20 cm/s. How much work has to be done to stop it?

Text Solution

Verified by Experts

`4J`
Promotional Banner

Similar Questions

Explore conceptually related problems

A box is dragged along a horizontal floor by a rope which makes an angle of 60° with the horizontal. How much work is done if the tension in the rope is 150 N and the box is dragged through a distance of 10 m.

A wooden block of mass 2 kg rests on a soft horizontal floor. When an iron cylinder of mass 25 kg is placed on top of the block, the floor yields steadily and the block and the cylinder together go down with an acceleration of 0.1 m s^(-2) . What is the action of the block on the floor (a) before and (b) after the floor yields ? Take g = 10 m s^(-2) . Identify the action-reaction pairs in the problem.

A car weighing 550 kg, ascends a hill with a gradient of 1 in 6 at a speed of 36 kmph. Find how much work is done per second, (a) in moving the car up the hill overcoming a total force of friction and air resistance equal to 350 kgwt.

A person weighing 30 kg walks on a level platform with a speed of 2 m/sec. The work done by the person against force of gravity is:

A spherical shell of mass 20 kg is stationary at the top of a hill of height 100 m. It rolls down a smooth surface to the ground, then climbs up another hill of height 30 m and finally rolls down to a horizontal base at a height of 20 m above, the ground. The velocity attained by the ball is :