Click to Chat
1800-1023-196
+91-120-4616500
CART 0
Use Coupon: CART20 and get 20% off on all online Study Material
Welcome User
OR
LOGIN
Complete Your Registration (Step 2 of 2 )
A Body of mass m is slowly pulled up the hill by a force F which at a point was directed along the tangent of the trajectory. All surfaces are smooth. Find the work performed by this force.
applying work energy theorem change in kinetic energy = work done by all forces = Wmg + Wext work by gravity = -mgh (-ve sign is because work is done against gravity) work by F is Wext change in kinetic energy = 0 so Wext - mgh = 0 Wext = mgh so work by force F is mgh , this work will not depend on the angle of incline ......
applying work energy theorem
change in kinetic energy = work done by all forces
= Wmg + Wext
work by gravity = -mgh (-ve sign is because work is done against gravity)
work by F is Wext
change in kinetic energy = 0
so
Wext - mgh = 0
Wext = mgh
so work by force F is mgh , this work will not depend on the angle of incline ......
Post Question
Dear , Preparing for entrance exams? Register yourself for the free demo class from askiitians.
points won -