# physics

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PHYSICS UNIT 2 Physics P2 for GCSE Additional Science or GCSE Physics
AQA GCSE Science PHYSICS 2 Unit P2.1 Forces and their effects
Appreciate that forces can cause changes to the shape or motion of an object.
Not only can objects can move in a straight line at a constant speed but they can also change their speed and/ or direction (accelerate or decelerate).
Be able to use/produce graphs can help us to describe the movement of an object.
These may be distance-time graphs or velocity-time graphs.
You should be able to use their skills, knowledge and understanding to: interpret data from tables and graphs relating to speed, velocity and acceleration evaluate the effects of alcohol and drugs on stopping distances evaluate how the shape and power of a vehicle can be altered to increase the vehicle’s top speed draw and interpret velocity-time graphs for objects that reach terminal velocity, including a consideration of the forces acting on the object.

AQA GCSE Science PHYSICS Unit P2.1.1 Resultant forces
a) Know and understand that whenever two objects interact, the forces they exert on each other are equal and opposite.
b) Know and understand that a number of forces acting at a point may be replaced by a single force that has the same effect on the motion as the original forces all acting together.
Know that this single force is called the resultant force.
c) Know and understand that a resultant force acting on an object may cause a change in its state of rest or motion.
You should be able to determine the resultant of opposite or parallel forces acting in a straight line.
d) Know and understand that if the resultant force acting on a stationary object is: zero, the object will remain stationary not zero, the object will accelerate in the direction of the resultant force.
e) Know and understand that if the resultant force acting on a moving object is: zero, the object will continue to move at the same speed and in the same direction not zero,

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