Types of Force

Question 1

Types of forces

Answer 1

Four fundamental types:
Gravitational-Attractive forces between masses
Electromagnetic-Forces relating to static and moving charges.
Strong nuclear-Holds atomic nuclei together.
Weak nuclear-Responsible for radioactive decay.
All others are essentially electromagnetic.

Question 2

Compression

Answer 2

The force in a squashed object.

Question 3

Tension

Answer 3

The force in a stretched object.

Tension and compression are ‘elastic forces’

Question 4

Friction

Answer 4

The force that resists two surfaces sliding past each other

Caused by ‘small bumps’ on two surfaces colliding

Question 5

Drag

Answer 5

Resists movement through a gas or liquid. ‘group name’ for forces like air and water resistance.

Question 6

Electrostatic

Answer 6

Force between charged objects

Question 7

Magnetic

Answer 7

Force exerted by a magnet on magnetic materials

Question 8

Normal Reaction

Answer 8

The force between two solid surfaces which stops them sinking into each other. It is always at right angles to surfaces.

Question 9

Thrust

Answer 9

Driving force

Question 10

Upthrust

Answer 10

The upwards force from a fluid on an object floating in it

Question 11

Lift

Answer 11

The upwards force on an object like an aeroplane wing due to pressure differences above and below it.