You need to know about forces and motion:
a) The acceleration of an object is determined by the resultant force acting on the object and the mass of the object.
a = F / m or F = m x a
b) The gradient of a distance–time graph represents speed.
c) Calculation of the speed of an object from the gradient of a distance–time graph.
d) The velocity of an object is its speed in a given direction.
e) The acceleration of an object is given by the equation:
a = (v–u) / t
f) The gradient of a velocity–time graph represents acceleration.
g) Calculation of the acceleration of an object from the gradient of a velocity–time graph.
h) Calculation of the distance travelled by an object from a velocity–time graph.
You also need to know about forces and braking:
a) When a vehicle travels at a steady speed the resistive forces balance the driving force.
b) The greater the speed of a vehicle the greater the braking force needed to stop it in a certain distance.
c) The stopping distance of a vehicle is the sum of the distance the vehicle travels during the driver’s reaction time (thinking distance) and the distance it travels under the braking force (braking distance).
d) A driver’s reaction time can be affected by tiredness, drugs and alcohol.
e) When the brakes of a vehicle are applied, work done by the friction force between the brakes and the wheel reduces the kinetic energy of the vehicle and the temperature of the brakes increases.
f) A vehicle’s braking distance can be affected by adverse road and weather conditions and poor condition of the vehicle.
You also need to know about terminal velocity:
a) The faster an object moves through a fluid (a liquid or a gas) the greater the frictional force that acts on it.
b) An object falling through a fluid will initially accelerate due to the force of gravity. Eventually the resultant force will be zero and the object will move at its terminal velocity (steady speed).
c) Drawandinterpretvelocity-timegraphsforobjects that reach terminal velocity, including a consideration of the forces acting on the object.
d) Calculate the weight of an object using the force exerted on it by a gravitational force:
Weight = m x g
You also need to know about elasticity:
a) A force acting on an object may cause a change in shape of the object.
b) A force applied to an elastic object such as a spring will result in the object stretching and storing elastic potential energy.
c) Foranobjectthatisabletorecoveritsoriginalshape, elastic potential energy is stored in the object when work is done on the object to change its shape.
d) The extension of an elastic object is directly proportional to the force applied, provided that the limit of proportionality is not exceeded:
F = k x e
where k is the spring constant and e is the extension