Forces

Question 1

A Force

Answer 1

• A push, pull or twist
• Measured in Newtons (N)
• Causes changes in shape, direction or movement

Question 2

Contact force

Answer 2

a force that acts only between objects that are touching.
Examples:
Friction

Question 3

Non-contact force

Answer 3

A force that acts between objects even though the objects aren’t touching
Examples: magnetic, gravity, electrostatic

Question 4

Gravity

Answer 4

• A pull
• It affects everything on Earth
• Weight= mass x gravity
• holds planets in orbit
• The larger something is, the more gravitational pull

Question 5

Friction

Answer 5

• Friction is the force we feel when two surfaces rub together
• We can increase the friction between surfaces by increasing the roughness
• The harder things are rubbing together, the more friction there is

Question 6

Mass

Answer 6

Is a measure of the amount of material in an object of substance.

Question 7

Weight

Answer 7

Weight of an object or substance is a measure of the force of gravity pulling it towards the centre of a large object (planet, moon, star)

Question 8

Air resistance

Answer 8

Is a type of friction that occurs whenever an object moves through the air, and is caused by the frictional forces acting between the air and the object.