SATS How To...
Welcome to the all new SATS How-to page. Here we will teach you valuble techniques that can be applied in your Maths, English & Science SATS exams, whatever the level. Forgotten how to convert a fraction? Unsure about how to plan an essay? Then the SATS How-to is for you!
Simply select your desired category from the list below and start learning...
| how to understand gravity and friction |
Gravity
An object has a mass, which is the total amount of material it is made of. Mass is not a force and is measured in Kilograms.
We measure forces in Newtons using a Force meter (also called a Newton meter).
The force that attracts or pulls the earth and an object (such as a person) towards each other is called gravity.
The pull on the mass of any object by the planet makes the force that we call weight.
Other planets, stars or moons also have gravity.
In a diagram we can show gravity or weight by an arrow towards the Earth.
Friction
When we try to move an object, the force preventing or slowing that movement is called friction.
If the object is already moving, the force slowing down the object is called friction, so friction is a push against a moving object.
Friction is a contact force between materials.
Air resistance is a type of friction between air and another material.
Friction can be a useful force because it prevents our shoes slipping on the road when we walk and stops car tyres sliding.
Remember! Upthrust is not a type of friction. Upthrust is an upward force found in gases and liquids. It is made by the gas or liquid below, pushing up more than the gas or liquid above.
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