Physics forces and motion AQA additional science (Yr9)

I dont know if this is detailed enough for Yr10 above, but it has some good stuff in it, each subtopic is on a different page. Please rate and comment so that I can improve c: Hope it helps!!

Thaaaanks x

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  • Created by: Aaliya
  • Created on: 26-05-12 10:10
Preview of Physics forces and motion AQA additional science (Yr9)

First 138 words of the document:

MOTION
Scalars and Vectors
A quantity with just a magnitude is a SCALAR
A quantity with magnitude and direction is a VECTOR
SCALA VECTOR
R
Distanc Displacemen
e t
Speed Velocity
Mass Forces
Time Acceleration
Pressur
e
DistanceTime Graphs
Straight is constant velocity
Positive Gradient is travel in one direction
Negative gradient is travel in opposite direction (towards start)
Acceleration is line curving up
Gradient of distancetime graphs
To calculate the gradient of the line on a graph, divide the change in the vertical axis by the
change in the horizontal axis. The gradient of a line on a distancetime graph represents the
speed of the object. Study this distancetime graph.
Velocity m/s

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FORCES AND TERMINAL VELOCITY
Terminal Velocity
1. The weight of the object. This is a force acting downwards, caused by the object's mass
the Earth's gravitational field.
2. Air resistance. This is frictional force acting in the opposite direction to the movement of
the object.
When an object is dropped, we can identify three stages before it hits the ground:
1. At the start, the object accelerates downwards because of its weight. There is no air
resistance. There is a resultant force acting downwards.
2.…read more

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FORCES AND ELASTICITY
Hooke's Law
When an elastic object such as a spring is stretched, the increased length is called its
extension. The extension of an elastic object is directly proportional to the force applied to it:
F = k × e
F is the force in newtons, N
k is the 'spring constant' in newtons per metre, N/m
e is the extension in metres, m
This equation works as long as the elastic limit (the limit of proportionality) is not exceeded.…read more

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The gradient of the line is the spring constant, k. The greater the value of k, the stiffer the
spring.
Elastic potential energy
A force acting on an object may cause the shape of an object to change. Elastic objects can
store elastic potential energy if they are stretched.…read more

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