Forces

Question 1

Force

Answer 1

Forces are always nearly pushed or pulls- they cannot be seen but the effects of the force can be seen

Question 2

Newton (N)

Answer 2

Unit of force

Question 3

Newton meter

Answer 3

Price of apparatus used to measure force

Question 4

Force can …

Answer 4

Change an objects speed,direction of motion and shape

Question 5

Balanced forces

Answer 5

Balanced forces are equal in size and opposite in direction so produce no change in direction

Question 6

Unbalanced forces

Answer 6

When two forces acting on a object are not equal in size resulting in a change of speed or direction

Question 7

Resultant force

Answer 7

This is the overall force acting on an object

Question 8

Contact force

Answer 8

Forces that act between two objects that are physically touching each other Examples of contact forces including pulling, pushing, friction, up thrust, air resistance, reaction force and tension

Question 9

Non contact force

Answer 9

Forces that act between two objects that are not physically touching each other examples of non contact forces include magnetic field, electrostatic force and weight

Question 10

Force diagram

Answer 10

Used to show the size and direction of a force. The length of the arrow is used to show the size of the force

Question 11

Hooke’s law

Answer 11

When an elastic object such as a spring, is stretched, the increased length is called it’s extension. Of an elastic object is directly proportional to the force applied to it as long as it is within it’s elastic limit