Forces and Magnetism
- Created by: Eesha Dev
- Created on: 27-06-15 12:22
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Forces
- Forces are nearly always pushes and pulls
- Forces cannot be seen by the effects of a force can be seen
- Forces are measured in Newtons (N) using a forcemeter
Forces can produce changes in:
- Speed
- Direction
- Shape
Balanced forces produce no chnage in movement but unbalanced forces can produce change
Key Words:
- Tension - a force in a rope when pulled
- Weight - the pull of gravity
- Drag - counter force produced when objects travel through gas or liquid
- Thrust - pushing force from engine or rocket
- Upthrust - force of water pushing you upwards when you float
- Moment - a turning force
- Electrostatic Force - when electric charges attract or repel
- Magnetism - when magnets attract or repel
Gravity
The force of attraction that exists between two masses is called gravity. Gravity is a non-contact force. This means that you do not have to be touching a mass to feel the effects of its gravity. The force of gravity is very weak. You need a mass the size of a planet or moon before…
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