The area of a man's foot is 80 `cm^(2)`. How much pressure will the man exert on the ground, while standing, if his weight is 80 kgf?

A load weighing 20,000 N is placed on a side with area 1000 "cm"^2 . How much pressure would it exert on the ground?

A boy weighing 60 kgf is wearing shoes with heel of area of cross section 20 cm^(2) , while a girl weighing 45 kgf is wearing sandals with heel of area of cross section 1.5 cm^(2) . Compare the pressure exerted on ground by their heels when they stand on the heel of one foot.

In the above problem, what force should the man exert on the rope to get his correct weight on the machine?

Find the base of the triangle whose : area =2.4 dm^(2) , height = 80 cm

A man weighs 80 kg on the surface of earth of radius r . At what height above the surface of earth his weight will be 40 kg ?

In fig. the man and the platform together weight 950N. The pulley can be treated as frictionless. Determine how hard the man has to pull on the rope to lift himself upward above the ground with constant velocity. If the weight of man is 550 N, what is the normal reaction between them?

In fig. the man and the platform together weight 950N. The pulley can be treated as frictionless. Determine how hard the man has to pull on the rope to lift himself upward above the ground with constant velocity. If the weight of man is 550 N, what is the normal reaction between them?

in figure shown AB is a plane mirror of length 40cm placed at a height 40cm from ground . There is a light source S at a point on the ground ,Find the maximum and minimum height of a man(eye height)required to see the image of the source If he is standing at a point A on ground shown in figure.

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?

A boy puts a heavy box of mass M of his head and jumps down from the top of a multistoried building to the ground. How much is the force exerted by the box on hishead during his free fall? Does the for greatly increase during the period he balances himself after striking teh ground?