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Kinematics:
Displacement is the shortest distance from an initial position to a final position, it is a vector a
quantity and so has both magnitude and direction.

Instantaneous speed is the speed of a body at a particular instant in time.

Average speed is a measure of the distance travelled…

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Velocity-time graphs:

The area between the line and the time-axis of a
velocity-time graph represents distance travelled by
an object.

The gradient of a velocity-time graph represents
acceleration.

Velocity (unlike speed) can be both positive and
negative.

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