P2 Physics - Forces
- Created by: heather-wilkins
- Created on: 30-01-14 13:57
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Acceleration
- Acceleration is the capacity to gain speed
- When an object moves in a straight line with a constant acceleration, you can calculate its acceleration if you know how much its velocity changes and how long this takes.
- a = (v – u) ÷ t
- acceleration = (velocity-starting velocity) ÷ time taken
Forces and Braking
- When a vehicle travels at a steady speed the driving force from the engine is balanced by air resistance and other resistive forces
- These are the forces that act on the car
- Gravity
- The reaction force
- The driving force
- Friction
- Air resistance
- The resultant force is the…
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