In a hydraulic machine, the area of small piston is 50 cm² and that of the large piston is 5 m². If an effort of 20 N is applied on the small piston, how much load
can be lifted on the large piston? Calculate.
[Ans: 2 × 10^N]

In the sport of parasailing, a person is attached to a rope being pulled by a boat while hanging from a parachute-like sail. a rider is towed at a constant speed by a rope that is at an angle of 15 ∘ from horizontal. the tension in the rope is 1900 n. the force of the sail on the rider is 30∘ from horizontal. what is the weight of the rider? express your answer with the appropriate units.

The material that keeps its new shape after it is stretched is called?

Aspring has a natural length of 8 m. if a 12-n force is required to keep it stretched to a length of 10 m, how much work w is required to stretch it from 8 m to 16 m? (round your answer to two decimal places.)