Thank you for registering.

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

Please check your email for login details.
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

The work done is zero when the force is acting perpendicular to the fsurface .this is becacuse cos90 is =0 .My question is why are we taking cos 90 here.

The work done is zero when the force is acting perpendicular to the fsurface .this is becacuse cos90 is =0 .My question is why are we taking cos 90 here.

Grade:10

1 Answers

Raheema Javed
156 Points
6 years ago
In this case the work done is the dot product force and distance,
F·ds = Fcosθds
where θ is the angle between the force vector and the direction of movement
In the notable case of a force applied to a body always at an angle of 90 degrees from the velocity vector (as when a body moves in a circle under a central force), no work is done at all, since the cosine of 90 degrees is zero.

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

ASK QUESTION

Get your questions answered by the expert for free