Force, Work And Power

Question 1

Push, pull, weight and friction

Answer 1

Are all examples of forces.

Question 2

Forces are measured using a

Answer 2

Spring balance

Question 3

Friction

Answer 3

Is a force which prevents easy movement between two objects in contact.

Question 4

The weight

Answer 4

Of an object is the force of gravity acting on it.

Question 5

Hooke’s Law

Answer 5

States that the extension of a spring depends on the size of the weight (force) attached to it.

Question 6

A graph of spring extension against

Answer 6

The weight (force) attached to it, gives a straight line through the origin (0,0).

Question 7

Energy

Answer 7

Is the ability to do work.

Question 8

Work

Answer 8

Is done when a force moves an object. Measured in joules (J).
Work(J) = Force(N) x Distance(m).

Question 9

Power

Answer 9

Is the rate at which work is done. Measured in watt(W).
Power is the amount of work done in one second.
Power = Work done(J)/ Time taken(S).

Question 10

Force

Answer 10

Is anything which causes an object to move or change its velocity.