A hope of radius 2 m weights 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?

A hope of radius 2 m weights 100 kg. It rolls along a horizontal floor

1.	A hope of radius 2 m weights 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?
Answer» 4 J 8 J 12 J 16 J Answer :A