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FORCES IN MOTION




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MOVEMENT AND POSITION


Distance time graphs
o The gradient is the speed
Motion
o Speed = Distance / Time
o Set up a track time how long it takes for different objects to travel
that distance and plot on a graph
o Acceleration = Change in velocity / time taken…

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FORCES AND MOVEMENT

Effects of forces
o Speed
When an object is stationary there are equal forces
acting upon it
When it is accelerating then the forward force is
greater than the backward force
When it is travelling at a constant speed all the forces
are again equal even though…

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Resultant force
o This can be found by combining vectors
o Pick a direction as the positive then any other forces
going in the opposite direction are taken away from
this value
o Force = mass x acceleration
Weight = mass x g
Terminal Velocity
o At the start weight…

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MOMENTS AND MOMENTUM

Momentum
o Momentum = force x velocity
o Momentum before an event = total momentum after if NO external forces
act
Force = Change in Momentum / Time Taken
o Safety features
In a crash crumples zones on cars and air bags increase the time
crashing meaning…

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ASTRONOMY

Gravity
o On earth gravity is 10
o Gravity is different on the moon because earth has a greater mass so
has a higher gravitational field strength
Comets moons and planets
o Gravity causes planets and moons to orbit
It is a balance of the forward motion and the…

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ELECTRICITY




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Comments

VVDVM

looks good

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