A spy jumps from an airplane with his pasrachute. The spy accelerates downward for some time when the parachute opens. The acceleration is sudenly checked and the spy slowly falls on the ground. Explain the action of parachute in checking the acceleration.

A paratrooper id dropped from an airplane. After some time his parachute opens and he reaches the ground with almost zero speed. This speed of fall (v) versus time (t) grapg will look like :

In the climax of a movie, the hero jumps from a helicopter and the villain chasing the hero also jumps from the same level . After sometime when they come at same horizontal level, the villain fires bullet horizontally towards the hero, Both were falling with constant acceleration 2(m)/(s^2), because of parachute, Assuming the hero to be within the range of bullet, which of the following is correct.

In the climax of a movie, the hero jumps from a helicopter and the villain chasing the hero also jumps from the same level . After sometime when they come at same horizontal level, the villain fires bullet horizontally towards the hero, Both were falling with constant acceleration 2(m)/(s^2), because of parachute, Assuming the hero to be within the range of bullet, which of the following is correct.

A ballon starts rising from ground from rest at some constant acceleration. After some time, a storne is dropped from it. If the stone reaches the ground in the same time in which balloon reached the dropping poing from ground, find the acceleration of the balloon.

A ballon starts risintg from ground from rest at some constant acceleration. After some time, a storne is dropped from it. If the stone reaches the ground in the same time in which balloon reached the dropping poing from ground, find the acceleration of the balloon.

A simple pendulum is suspended from the roof of a lift. What will be its time period when the lift moves downwards with an acceleration a