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Force

Revision as of 09:53, 13 October 2018 by NRJC (talk | contribs)

Key Stage 2

Meaning

A force is something which can make an object; speed up, slow down or change shape.

Noun: Force

About Forces

A force can make an object speed up. When you let go of a pencil it will fall because a force called weight is making it speed up.
A force can make an object slow down. When you roll a ball on the carpet it will slow down and stop because a force called friction has slowed it down.
A force can change the shape of an object. When you tip a spoon of honey the honey will change shape and stretch because a force called weight pulls it into a long shape before dripping.


Key Stage 3

Meaning

A force is an influence that can change the speed, direction or shape of an object.

About Forces

Forces can be split into two groups, Contact Forces and Non-contact Forces.
Contact Forces Non-contact Forces
Friction
Air Resistance
Water Resistance
Upthrust
Driving Force
Thrust
Gravitational Force (Weight)
Magnetic Force
Electrostatic Force
Forces can cause an object to accelerate.
A pair of opposing forces can twist, stretch or squash an object. This is known as deformation.

Representing Forces

Forces can be represented in a diagram with arrows that show the magnitude and direction of the force. A bigger arrow means a bigger force.