Derive an expression for the distance covered by the body during nth second of its motion.

A stone falls freely from rest and the total distance covered by it in the last second of its motion equals to the distance covered by it in the first three seconds of its motion. What much time for the stone remains in air?

A body starting from rest , moves with uniform acceleration . The distance covered by the body in time is proportional to

A car starts from rest and moves with constant acceleration. The ratio of the distance covered in the nth second to that covered in n seconds is

Derive an expression for the potential at a distance r from a point charge +q .

What is Doppler's effect? Derive an expression for the apparent frequencies when the medium at source is in motion, observe at rest.

By which velocity a ball is projected vertically so that the distance covered by it in 5th second is twice the distance it covers in the 6th second

An electric dipole of small length lies along X-axis of a coordinates system. Derive an expression for the magnitude of electric field E due to the dipole at any point on its equatorial line. Mention its direction.

A block of mass 10 kg kept on a rough horizontal surface can be maintained in uniform motion in a straight line when the force of 50 N is applied to the body in the direction of it’s motion. Find the coefficient of kinetic friction between the surfaces.；