For a given height, ………… the length l of the inclined plane, lesser will be the effort required.
Name one property of waves that do not change when the waves pass from one medium to another?
A force is applied in i) a non- rigid body and ii) a rigid body. How does the effect of the force differ in the above two cases?
A metallic ball is hanging by a string from a fixed support. Draw a neat labelled diagram showing the forces acting on the ball and the string.
i) When does a force do work?
ii) What is the work done by the moon when it revolves around the Earth?Calculate the change in kinetic energy of a moving body if it’s velocity is reduced to 1/3rd of the initial velocity.