Laws of Motion ...

A ball of mass m moves with speed v and it strikes normally with a wall and reflected back normally, if its time of contact with wall is t, then find force exerted byball on wall

A plumb line is suspended from a ceiling of a car moving with horizontal acceleration of a. What will be the angle of inclination with vertical?

A force of 10 N acts on a body of mass 20 kg for 10 s.Change in its momentum is

A body of mass 1.0 kg is falling with an acceleration of 10 m/s². Its apparent weight will be (g = 10 m/s²)

A lift accelerated downward with acceleration \'a\'. A man in the lift throws a ball upward with acceleration a₀(a₀< a). Then, acceleration of ball observed byobserver, which is on Earth, is

A lift is moving down with acceleration a. A man in the lift drops a ball inside the lift. The acceleration of the ball as observed by the man in the lift and a man standing stationary on the ground are respectively

If in a stationary lift, a man is standing with a bucket full of water, having a hole at its bottom. The rate of flow of water through this hole is R₀. If the lift starts to move up and down with same acceleration and then that rates of flow of water are R_u and R_d, then

A gun fires N bullets per second, each of mass m with velocity v. The force exerted by the bullets on the gun is

A man is standing at the centre of frictionless pond of ice. How can he get himself to the shore?

A student attempts to pull himself up by tugging on hishair. He will not succeed