The elephant weighs 20,000 N stands on one foot of area 1000 cm2. How much pressure would it exert 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 hydraulic automobile lift is designed to lift cars with a maximum mass of 3000 kg. The area of cross-section of the piston carrying the load is 425 cm^2 . What maximum pressure would the smaller piston have to bear?

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 hoop of radius 2 m weighs 100 kg. It rolls along a horizontal floor so.that its centre of mass has a speed of 20 cm/s. How much work has to be done to stop it?

The plates of a parallel plate capacitor have an area of 9cm^2 each and are separated by 5mm. The capacitor is charged by connecting it to 320v supply. How much electrostatic energy is stored by the capacitor?

A force of 5N changes the velocity of a body from 10ms^-1 to 20ms^-1 in 5 sec. How much force is required to bring about the same change in 2 sec.

A tank with a square base of area 1.0 m^-2 is divided by a vertical partition in the middle. The bottom of the partition has a smallhinged door of area 20 cm^2 . The tank is filled with water in one compartment, and an acid (of relative density 1.7) in the other, both to a height of 4.0 m. compute the force necessary to keep the door close.

Water in a canal,6 m wide and 1.5 m deep,is flowing with a speed of 10km/h.How much area will it irrigate in 30minutes,if 8cm of standing water is needed?