1. Speed can be calculated by Speed = Distance/Time
Calculating Speed
Speed can be calculated by
Speed = Distance/Time
A distance-time graph can be used to see when an object is stationary or travelling at a constant speed.
The steeper the slope, the faster the speed. The gradient of a distance-time graph shows the speed.
Calculating Speed

2. Distance-time graph
Distance-time graph

3. Distance-time graph
Distance-time graph

4. Speed equation
Speed equation

5. Velocity-time graphs
Velocity includes the speed of an object and the direction in which it travels.
Velocity-time graphs can be used to see when an object is moving with constant velocity or constant acceleration.
The steeper the slope, the greater the acceleration.
The gradient of a velocity-time graph shows the acceleration.
The area underneath a velocity-time graph shows distance travelled.
Velocity-time graph

6. Speed-time graph
Speed-time graph

7. Speed-time graph
Speed-time graph

8. Speed-time graph
Speed-time graph

9. Acceleration is the rate at which velocity changes.
Acceleration = Change in velocity / Time taken
Acceleration depends on the mass of the object and the force applied
Acceleration = Force/Mass
Acceleration can be increased by reducing mass and increasing the force of the engine
Acceleration

10. Acceleration
Acceleration

11. Stopping distances
The greater the speed of a vehicle, the greater the braking force needed to stop it.
Skidding occurs if the braking force is too great (there is not enough friction between the tyres and the road).
Stopping distances depend on the speed of the car, driver reaction times, the type of surface, tyre quality, brake quality, and weather conditions
Stopping distances

12. Braking distance
Braking distance

13. Car crash
Car crash

14. Quiz
Quiz

15. Wordsearch
Wordsearch