1. Force and motion Revise the following: Distance time graphs
Velocity-time graphs
Resultant force
Terminal velocity
Stopping distances

2. Distance time graph

3. Distance time graph

4. Distance time graph

5. Velocity-time graph

6. Velocity-time graph

7. Velocity-time graph

8. Velocity-time graph

9. Distance-time graph
Velocity-time graph

10. Resultant forces
There are usually several different forces acting on an object. The overall motion of the object will depend on the size and direction of all the forces.
The motion of the object will depend on the resultant force. This is calculated by adding all the forces together, taking their direction into account.
50 N
30 N
Resultant force on the crate = 50 N – 30 N
= 20 N to the left

11. Resultant force Resultant force = mass x acceleration
Object at the start
Resultant force
Effect on the object
Stationary
Zero
Remain stationary
Not zero
Accelerate in the direction of the resultant force
Moving
Continue to move at same speed in same direction
Resultant force = mass x acceleration
newton (N) kilogram (kg) metre/second2 (m/s2)

12. Terminal velocity
The faster a body moves through fluid, the greater the frictional force which acts on it.
A body falling through a fluid will initially accelerate due to the force of gravity.
Eventually the resultant force on the body will be zero and it will fall at its Terminal velocity

13. Stopping distance