How is a stationary object represented in a distance-time graph?

A horizontal, straight line

How is an object moving at a constant speed shown on a distance-time graph?

A straight line that slopes upwards

What does the gradient of a line in a distance-time graph represent?

The speed

If the gradient of the line in a distance-time graph is steeper what does it show?

The speed is greater

What is the equation for speed?

Speed = distance/time

What goes on the x-axis and what goes on the y-axis on a distance-time graph?

x - time

y - distance

What does the term **velocity** mean?

Speed in a given direction

An object moving steadily round in a circle has a constant speed but why not a constant velocity?

The direction keeps changing

What is meant by the term **acceleration**?

The change of velocity per second.

What is the scientific unit for speed?

m/s

What is the scientific unit for acceleration?

m/s^{2}

What is the equation for calculating acceleration?

acceleration = change in velocity in m/s / time taken for the change in s

Change in velocity is **final velocity - initial velocity**

**a= v-u / t**

What term is used when an object decelerates?

Deceleration or negative acceleration

What does a line sloping upwards show?

Acceleration

What does a straight line sloping upwards show?

Constant acceleration

What does the gradient in a velocity-time graph represent?

Acceleration

How is constant velocity shown on a velocity-time graph?

A horizontal, straight line

If the gradient of a line in a velocity-time graph is negative, what does it show?

Deceleration

What does the area underneath the line in a velocity-time graph represent?

Distance