A disc of radius 2 m and mass 100 kg rolls on a horizontal floor. Its centre of mass has…
Physics · NEET · NTA Exams — Work, Energy and Power
A disc of radius 2 m and mass 100 kg rolls on a horizontal floor. Its centre of mass has speed of 20 cm/s. How much work is needed to stop it?
- 3 J
- 30 kJ
- 2 J
- 1 J
Answer
(D) 1 J
Sign up free on Edukali to view the step-by-step worked solution and practice thousands of similar questions.
Related practice questions
- An engine pumps water continuously through a hose. Water leaves the hose with a velocity v and m is the mass…
- A ball of mass 2 kg and another of mass 4 kg are dropped together from a 60 feet building. After a fall of 30…
- A body of mass 2 kg is let fall from the top of a 10 m tall building. It lands on a sandy patch of ground and…
- A particle moves from a point (-2 i +5 j ) to (4 j +3 k ) when a force of (4 i +3 j ) N is applied. How much…
- The potential energy of a long spring when stretched by 2 cm is U. If the spring is stretched by 8 cm the…
- Masses of the two substances are 1 g and 9 g respectively. If their kinetic energies are same then the ratio…
- A particle of mass m 1 is moving with a velocity v 1 and another particle of mass m 2 is moving with a…
- If the linear momentum of a body is increased by 50%, then the kinetic energy of that body increased by
More Work, Energy and Power questions · Browse all practice questions