#### Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Click to Chat

1800-1023-196

+91-120-4616500

CART 0

• 0
MY CART (5)

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

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping

# When a body is moved with uniform velocity/speed, how the work is defined because here acceleration is 0 . It means force is 0.So, work done should also be 0 but actually its not ?

Avijit Arya
33 Points
11 years ago

There is actually no work done if there is 'no force' acting on the body, or if the 'velocity' does not change. But in case of a non conservative force like friction, if you are keeping the velocity of body constant, then definitely you have to work against the dissipative forces of friction. You can see this by Work Energy theorem also. WE theorem tells, W(c)+W(nc)+W(ext)= change in Kinetic energy. since W done by conservative force zero and change in kinetic energy is also zero, hence W done by external agent = work done by non conservative forces with a -ve direction.

Thank you

47 Points
11 years ago

work done = force x displacement

in case of constant velocity

1- work done will be zero, if constant velocity is maintained without any external force like any object is moving on smooth surface.

2 - work done will not be zero, if any external force is applied to maintain the constant velocity, like object on a rough surface. In this case work is done against friction forces.