A girl is walking on a horizontal levelled road, the work done by the gravitational force on her will be?

Consider a drop of rain water having mass 1 g falling from a height of 1 km . It hits the ground with a speed of 50 m//s Take g constant with a volume 10 m//s^(2) . The work done by the (i) gravitational force and the (ii) resistive force of air is :

The work done by the centripetal force in quarter revolution would be,

A spherical shell of radius b with charge Q is expanded to a radius a. Find the work done by the electrical forces in the process.

A time dependent force F=6t acts on a particle of mass 1kg . If the particle starts from rest, the work done by the force during the first 1 sec. will be

A labourer is carrying a stone of mass 25 kg on his head on a level road. Work done by him against the gravity is

A cyclist comes to skidding spot in 10 m. If the opposing force on the cycle due to the road is 200 N. The work done by the road on the cycle is

Questions based on paragraph A man pulls a cart on a horizontal road of 2 m by applying a force of 200 N. Later the road gets inclined at an angle of 60° with horizontal and man starts pulling his cart from base of the inclined road to the top. The length of the inclined portion of road is 4 m. Based on the given information answer the following questions. What will be the work done by the man to pull the cart along the inclined part of the road?

According to the work energy theorem, the work done by the net force on a particle is equal to the change in its

Answer the following questions: Obtain an expression for the work done by a force acting on a body when the angle between the force and the dispalcemnt of the body is 0.