Science : Forces
- Created by: lilyyyyy___xx_
- Created on: 05-06-17 18:42
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- Forces
- Gravitational
- Objects are attracted to each other due to the gravitational forces between the sun and planets.
- Gravity keeps our feet on the ground and pulls us back towards the centre of the earth as well as keeping all the plants in orbit around the sun
- Objects are attracted to each other due to the gravitational forces between the sun and planets.
- Measuring Forces
- Measred with a force meter or a newton meter.
- The unit of force is called a newton (N)
- Bigger the force longer the spring will stretch and the bigger the reading.
- Measred with a force meter or a newton meter.
- Pressure
- Balanced?
- 2 equal forces acting in opposite direction
- Either: object stays stationary or keeps moving in same direction at a constant pace.
- Hanging objects
- Diagrams always show the direction of movement with arrow and labelled with the name and size of the force (N)
- Objects floating on water
- Weight is blanced by up-thrust from the water.
- Unbalanced forces
- When two opposite forces are not equal .
- The overall force is called the resultant force
- A non-moving object begins to move in the direction of the resultant force.
- A moving objects changes direction or speed depended of the resultant force
- When two opposite forces are not equal .
- Friction and air resistance
- Forces act in opposite directions.
- Make it more difficult for objects to move and therefore may reduce their speed
- It can be usefu; from stopping us slipping. Helping cars ot skid and helps cars etc slow down easier.
- Faster an object moves the bigger the air resistance becomes.
- Forces act in opposite directions.
- Moments
- Either push or pull. You cannot see a force but you can see what it does. It can change the speed, direction or shape of an object. Contact or non-contact?
- Gravitational
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