1. Balanced and Unbalanced Forces
When the brakes are applied, the drag force increases and the car decelerates.
Drag forces, due to friction and air resistance, act in the opposite direction.
When the forces acting on the car are balanced, the resultant force is zero. It stops accelerating and moves at a constant speed.
The resultant force decreases and the acceleration decreases.
When the force produced by the engine is transferred to the rear wheels (via the transmission system) the forces on the car are unbalanced and it accelerates.
110
120
This Powerpoint is hosted on
Please visit for the other free powerpoints
100
140
100
120 80
mph
160 80
rpm x100
130 60
180 40
200 60
140 20
220 40
150 1 2 3 4 5 6 7 20
160
Neutral
Silverstone
Silverstone
Silverstone
Silverstone
Silverstone
Silverstone
Silverstone
Silverstone
Silverstone
Silverstone
Silverstone
Silverstone
Silverstone
Silverstone
Silverstone
Silverstone
Drag Force
(Thrust) Forward Force
Resultant Force Resultant Force