A box weighing 2 kg exerts a force of 20 N on the ground. The box covers an area of 2 sq. m on the ground. Find the pressure exerted by the box on the ground.

A force of 1200 N acts on the surface of area 10 cm2 normally. What would be the thrust and pressure on the surface?

A man holds a 10 kg box 2m above the ground.What is the work done?

A circus artist is climbing a 20 m long rope.which is tightly stretched and tied from the top of a vertical pole to the ground.Find the height of the pole,if the angle made by the rope with the ground level is 30^@ (see Fig 9.11)

Calculate the pressure produced by a force of 800 N acting on an area of 2.0 m2

A force of 10 N is applied to a body at rest for 3 sec. The velocity of the body becomes 2 m/s. Find the mass of the body.

A car weighs 1800 kg. The distance between its front and back axles is 1.8 m. its centre of gravity is 1.05 m behind the front axle. Determine the force exerted by the level ground on each front wheel and each back wheel.

A rain drop of radius 2 mm falls from a height of 500 m above the ground. It falls with decreasing acceleration (due to viscous resistance of the air) until at half its original height, it attains its maximum (terminal) speed, and moves with uniform speed thereafter. What is the work done by the gravitational force on the drop in the first and second half of its journey? What is the work done by the resistive force in the entire journey if its speed on reaching the ground is 10 m s-^1 ?

The elephant weighs 20,000 N stands on one foot of area 1000 cm2. How much pressure would it exert on the ground?

Calculate the pressure produced by a force of 800N acting on an area of 2 m^2

A 8000 kg engine pulls a train of 5 wagons, each of 2000 kg, along a horizontal track. If the engine exerts a force of 40000 N and the track offers a friction force of 5000 N, then calculate : the force of wagon 1 on wagon 2.