Q1 of 11 Page 83

Which are the factors influencing the amount of work?

In terms of physics, work is done only when the applied force produces any motion in the object(on which force is applied).

Hence, in terms of mathematical formula,


Amount of work done = force applied × displacement of the object


W = F × d


So, this is observable that amount of work is dependent/influenced by two quantities:-


•Force applied on the body


•Displacement of the body.


More from this chapter

All 11 →
2

A boy is trying to push the concrete pillar of the building using a force of 300 N. Calculate the amount of work done by the boy.

 3

A bench of mass 40 kg is brought from the first floor of the school to the second floor. The height difference between the floors is 3m.

Calculate the work done against the gravitational force when the bench is raised up.

 3

A bench of mass 40 kg is brought from the first floor of the school to the second floor. The height difference between the floors is 3m.

What is the work done against the gravitational force if the bench is shifted from one room to another by pushing it across the floor?

 4

From what you have learnt of potential energy and kinetic energy, write down the form of energy possessed by the bodies given below.

(a) running train


(b) water in a dam


(c) stretched rubber band


(d) mango falling from a tree