A man of mass M jumps from an aeroplane as shown in figure-4.43. He sees the hard ground below him and a lake at a distance d from the point directly below him. He immediately put off his jacket (mass=m) and throws it in a direction directly away from the lake. If he just fail to strike the ground, find distance he should walk know to pick his jacket. (Neglect air resistance and take the velocity of man at the time of jump with respect to earth is zero.)

A man of mass M = 58 kg jumps from an aeroplane as shown in Fig. He sees the hard ground below him and a lake at a distance d = 1 m from the point directly below him. He immediately puts off his jacket (mass m = 2 kg) and throws it in a direction directly away from the lake. If he just fails to strike the ground, find the distance (in 10^(1) m ) he should walk now to pick his jacket. (Neglect air resistance and take the velocity of man at the time of jump with respect to earth zero.)

The driver of a car travelling at speed v suddenly sees a wall at a distance r directly infront of him. To avoid collision, should he apply the brakes or turn the car sharply away from the wall ? Give reason.

A pocket is dropped from an aeroplane when it is directly above a point X on the ground and hits the ground at Y. If the aeroplane is moving horizontally with a speed of 600 km/h, 1, 000m above the ground , find the distance XY.

A diver in a lake wants to signal his distress to a person sitting on the edge of the lake flashing his waterproof torch. He should direct the beam

A 1.5m tall boy is standing at some distance from a 30m tall building.The angle of elevation from his eyes to the top of the building increases from 30 to 60o as he walks towards the building.Find the distance he walked towards the building.

Rajesh's village is 50 km away from his home. He travels 45 km of the distance by bus and the rest by walking. What fraction of the distance does he travel by bus? Express the fraction in its lowest term.

A man whose mass is m kg jumps vertically into air from the sitting position in which his centre of mass is at a height h_(1) from the ground. When his feet are just about to leave the ground his centre of mass is at height h_(2) from the ground and finally centre of mass rises to h_(3) above the ground when he is at the top of the jump. what is the average upward force exerted by the ground on him?

If a man of ,mass M jumps to the ground from a height h and his centre of mass noves a distance x in the time taken by him to 'hit' the ground the average force acting on him (assuming his retardation to be constant during his impact with the ground) is :

If a man of mass M jumps to the ground from a height h and centre of mass moves a distance x in time taken by him to hit the ground, show that the average force acting on him is Mgh//x .