Kinematics Test...

A parachutist falls freely from an aeroplane for 10s before the parachute opens out. Then he descends with a net retardation of 2.5 m/s². If he bails out of the plane at a height of 2495 m, his velocity on reaching the ground will be

For a particle moving along a straight line, the displacement x depends on time t as x = t³ + t² + t + . The ratio of its initial acceleration to its initial velocity depends

Two balls of same masses are shot upward one after another at an interval of 2 second along the same vertical line with same initial velocity of 40 m/s. The height at which they collide

A bird flies for 4 s with a velocity of |t  - 2| m/s in a straight line, where t is the time in second. It covers a distance of