WEP & Circular Motion Definitions

Question 1

Work done

Answer 1

Work done by a force is defined as the product of the force and displacement in the direction of the force

Question 2

Joule

Answer 2

1 joule is defined as the work done when a force of 1 newton moves its point of application by 1 metre in the direction of the force

Question 3

Principle of conservation of energy

Answer 3

The principle of conservation of energy states that energy can neither be created nor destroyed in any process, it can be transferred from one form to another, and transferred from one system to another, but the total amount remains constant

Question 4

Power

Answer 4

Power is defined as the work done per unit time

Question 5

One watt

Answer 5

One watt is defined as the power when one joule of work is done per second

Question 6

Radian

Answer 6

One radian is defined as the angle subtended at the centre of a circle by an arc equal in length to the radius of the circle

Question 7

Angular velocity

Answer 7

An angular velocity is defined as the rate of change of angular displacement