Chapter 8 FORCES

Question 1

Gravity

Answer 1

the force of attraction that exists between any two bodies in the universe that have mass. The gravity at the Earth’s surface is the pull on objects near its surface towards the centre of the Earth

Question 2

Contact force

Answer 2

A force that acts only between objects that are touching

Question 3

Non contact force

Answer 3

a force that acts between objects even though the objects are not touching

Question 4

Magnetic forces

Answer 4

The force(a push or pull) that acts between magnets (including the earth) and magnetic objects

Question 5

Electrostatic force

Answer 5

A non-contact force of electric charges at rest. We experience

Question 6

Permanent magnets

Answer 6

a magnet that retains its magnetic effect for many years

Question 7

Temporary magnet

Answer 7

A magnet that stays magnetic only while it touches a permanent magnet or one that is magnet for a very short time

Question 8

Repulsion

Answer 8

An opposing force

Question 9

Magnetic field

Answer 9

a map of lines showing the size and direction of a magnetic force. The size of the force is shown by how close together the lines are. The direction at any point is given by the direction in which the north pole of a magnet would face

Question 10

Force

Answer 10

a push, pull or twist. Forces are measured in newtons (N). (verb) to push, pull or twist