A body is standing on a horizontal surface wearing skates. What will the boy experience if he pushes the wall?

A spherical ball rolls without slipping on a horizontal surface and its rotational kinetic energy is equal to the translational kinetic enregy.The body is :

A body is moving at constant speed over a frictionless surface. What is the work done by the weight?

A body is being raised to height h from the surface of earth. What is the sign of work done by applied force

A body weighs 63 N on the surface of the earth. What is the gravitational force on it due to the earth at a height equal to half the radius of the earth ?

Two persons having the same mass are standing on ice-skates some distance apart on a frictionless surface.a rope is fastened around the body of a person,the other end of which si in the hand of the second person.What would happen if the second person pulls the rope?

A body is being raised to height h from the surface of earth. What is the sign of work done by gravitational force?

A 1.5 m tall boy is standing at some distance from a 30 m tall budding. The angle of elevation from his eyes to the top of the building increasesfrom 30^@ to 60^@ as he walks towards the building. Find the distance he walked towards the building.

A glass plate of length 10 cm, breadth 4 cm and thickness 0.4 cm weighs 40 g in air. If it is held vertically with long side horizontal and the plate half immersed in water, what will be its apparent weight? Surface tension of water = 70 dyne cm^-1 .