A parachutist steps from an aircraft, falls freely for two second, and then opens his parachute. Which of the following acceleration time `(a - t)` graphs best represents his downward acceleration `a` during the first 5 second ?

Which of the following graphs best represents the variation of acceleration 'a' with displacement x?

Which of the following graphs best represents the variation of acceleration 'a' with displacement x?

A particle starts from rest, accelerates uniformly for 3 seconds and then decelerates uniformly for 3 seconds and comes to rest. Which one of the following displacement (x)-time (t) graphs represents the motion of the particle?

The given acceleration-time graph represents which of the following physical situation?

The given acceleration-time graph represents which of the following physical situation?

The graph shown the variation with times t of the velocity v of an object . Which one of the following graphs best represents the variation of acceleration a of the object with time t ?

The graph shown the variation with times t of the velocity v of an object . Which one of the following graphs best represents the variation of acceleration a of the object with time t ?

The graph shown the variation with times t of the velocity v of an object . Which one of the following graphs best represents the variation of acceleration a of the object with time t ?

A parachutist after bailing out falls freely for 50 metres. Then his parachute opens and he falls with deceleration of 2ms^-2 When he reaches the ground his speed is reduced to only 3 metres per seconds. at what height did he bail out ? For how long was he in air ?

A parachutist after bailing out falls freely for 50 metres.Then his parachute opens and he falls with deceleration of 2 ms^(-2) When he reaches the ground his speed is reduced to only 3 metres per second.At what height did he bail out ? For how long was he in air ?