# PHYSICS P2 1.MOTION

- Created by: Meeka Hanson
- Created on: 11-11-12 14:10

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- Distance time graphs
- They show whether an object is stationary (Horizontal line)or whether it is moving at a constant speed which is a straight line that slopes upwards
- The Gradient of a line on a distance time graph represents speed

- Speed
- With an object that is moving at a constant speed. I can calculate its speed by ...
- EQUATION- SPEED (m/s) = distance travelled (m) / time taken in seconds
- DISTANCE = SPEED/TIME
- Speed in action: TACHOGRAPHS IN CARS (CHECK DRIVERS DON'T DRIVE FOR TOO LONG.)

- PHYSICS P2 1.1 Motion
- Velocity
- DEFINITION: VELOCITY IS SPEED WITH A GIVEN DIRECTION
- When an object moving steadily around a circle it HAS a constant SPEED. However the direction of the motion changes continuously as it goes around so the velocity is not constant.
- Two moving objects can have the same speed by different velocities, depending on the direction in which they are going.
- Acceleration
- Acceleration of an object is its change in velocity per second
- UNIT: METERS PER SECOND SQUARED

- ANY OBJECT WITH CHANGING VELOCITY IS ACCELERATING.
- EQUATION: ACCELERATION (M/S2)= Changing velocity per second m/s / time taken for change in seconds.
- For an object that accelerates from an initial velocity (u) to a final velocity v) you have to do the following equation. ..
- EQUATION : ACCELERATION (A)= v-u / time.
- EQUATION: ACCELERATION (M/S2)= Changing velocity per second m/s / time taken for change in seconds.
- For an object that accelerates from an initial velocity (u) to a final velocity v) you have to do the following equation. ..
- EQUATION : ACCELERATION (A)= v-u / time.

- EQUATION : ACCELERATION (A)= v-u / time.

- For an object that accelerates from an initial velocity (u) to a final velocity v) you have to do the following equation. ..

- EQUATION: ACCELERATION (M/S2)= Changing velocity per second m/s / time taken for change in seconds.

- EQUATION : ACCELERATION (A)= v-u / time.

- For an object that accelerates from an initial velocity (u) to a final velocity v) you have to do the following equation. ..

- EQUATION: ACCELERATION (M/S2)= Changing velocity per second m/s / time taken for change in seconds.
- DECELERATION: NEGATIVE ACCELERATION FOR ANY SITUATION IS WHEN AN OBJECT SLOWS DOWN.

- Acceleration of an object is its change in velocity per second

- More about VELOCITY TIME GRAPHS
- The gradient of a line on a velocity-time graph represents acceleration
- If a velocity-time graph is a horizontal line, the acceleration is ZERO.

- Velocity

- They show whether an object is stationary (Horizontal line)or whether it is moving at a constant speed which is a straight line that slopes upwards
- BRAKING
- More about VELOCITY TIME GRAPHS
- The gradient of a line on a velocity-time graph represents acceleration
- If a velocity-time graph is a horizontal line, the acceleration is ZERO.

- More about VELOCITY TIME GRAPHS

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