P2 ADDITIONAL SCIENCE UNIT 2 PHYSICS ALL CHAPTERS MAINLY FOR FOUNDATION

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  • Created by: bffonly
  • Created on: 14-06-17 14:06
1.1 DISTANCE TIME GRAPHS
The gradient of the line on a distance-time graph represents an object's speed. The steeper the line on a distance time graph the greater the speed it represents.
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1.2 VELOCITY AND ACCELERATION
Velocity is speed in a given direction. acceleration is the change of velocity per second
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1.3 MORE ABOUT VELOCITY TIME GRAPHS
I the line on a velocity time graph is horizontal , the acceleration is zero. the gradient of a velocity time graph represents acceleration .
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2.1 FORCES BETWEEN OBJECTS
force can change the shape of an object or change its motion or state of rest. The unit of force is the newton N. when 2 objects interact they always exert equal and opposite forces on each other.
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2.2 RESULTANT FORCE
The resultant force is a single force that has the same effect as all the forces acting on an object.
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2.3 FORCE AND ACCELERATION
The bigger the resultant force on an object the greater its acceleration/ the greater the mass of an object the smaller its acceleration for a given force.
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2.4 ON THE ROAD
friction and air resistance oppose the driving force of a car. the stopping distance of a car depends on the thinking distance and the braking distance.
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2.5 FALLING OBJECTS
the weight of an object is the force of gravity on it.its mass is the quantity of matter in it.
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2.6 STRETCHING AND SQUASHING
the extension is the difference between the length of the spring and its original length. the extension of a spring is directly proportional to the force applied to it, provided the limit of proportionality is not exceeded. the spring is constant of
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2.7 FORCE AND SPEED ISSUES
fuel economy of road vehicles can be improved by reducing the speed or fitting a wind deflector.
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3.1 ENERGY AND WORK
work is done on an object when a force makes the object move.
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3.2 GRAVITATIONAL POTENTIAL ENERGY
the gravitational potential energy of an object depends on its weight and ow far it moves vertically.
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3.3 KINETIC ENERGY
the kinetic energy of a moving object depends on its mass and its speed. elastic potential energy is the energy stored in an elastic object when work is done on the object.
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3.4 MOMENTUM
P= M x V , the unit of momentum is kg m/s . momentum is conserved whenever objects interact provided no external forces act on them.
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3.5 EXPLOSIONS
when 2 objects push each other apart they move apart: with different speeds if they have unequal masses , with equal and opposite momentum so their total momentum is zero.
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3.6 IMPACT FORCES
when vehicles collide, the force of the impact depends on mass, change of velocity and the duration of the impact. when2 vehicles collide: they exert equal and opposite forces on each other, their total momentum.
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Other cards in this set

Card 2

Front

Velocity is speed in a given direction. acceleration is the change of velocity per second

Back

1.2 VELOCITY AND ACCELERATION

Card 3

Front

I the line on a velocity time graph is horizontal , the acceleration is zero. the gradient of a velocity time graph represents acceleration .

Back

Preview of the back of card 3

Card 4

Front

force can change the shape of an object or change its motion or state of rest. The unit of force is the newton N. when 2 objects interact they always exert equal and opposite forces on each other.

Back

Preview of the back of card 4

Card 5

Front

The resultant force is a single force that has the same effect as all the forces acting on an object.

Back

Preview of the back of card 5
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