Use Coupon: CART20 and get 20% off on all online Study Material

Total Price: Rs.

There are no items in this cart.
Continue Shopping
ravi pratap Grade: 12

Q A block of mass m is raised from the floor to the surface of a table h metres high now initially the the kinetic enrgy was zero and finally the kinetic energy is again zero.Then  what about the work done?Because work-energy theorem says that "change in kinetic energy is the work done."

9 years ago

Answers : (1)

devashish trivedi
8 Points

Work - energy theorem still holds here net work done is still zero  because external agent is also working here against the gravity and the

gravity is doing the negetive work done here and external agent is doing the positive work done but in equal amount so the net work done will be

zero here. And the "mgh" is the work done only by the external agent that is accounted in the question.

9 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies
  • Complete Physics Course - Class 12
  • OFFERED PRICE: Rs. 2,756
  • View Details
  • Complete Physics Course - Class 11
  • OFFERED PRICE: Rs. 2,968
  • View Details

Ask Experts

Have any Question? Ask Experts

Post Question

Answer ‘n’ Earn
Attractive Gift
To Win!!! Click Here for details