Year 9 Revision Forces (1)

What is the formula to calculate average speed?

Average Speed (m/s) = Distance travelled (m) / Time (seconds)

How do you find distance using speed and time?

Distance (m) = Speed (m/s) × Time (seconds)

What is acceleration?

Acceleration occurs when an object's speed changes.

What is the formula for calculating acceleration?

Acceleration (m/s²) = (Final speed (m/s) - Starting speed (m/s)) / Time taken (seconds)

What does a negative acceleration indicate?

A negative answer indicates deceleration.

When an object is at rest, how does it appear on a distance-time graph?

A horizontal line indicates the object is at rest.

What does a diagonal line on a distance-time graph represent?

A diagonal line indicates the object is moving at constant speed.

What does a constant speed look like on a speed-time graph?

Constant speed is shown as a horizontal line.

What does an upward line indicate on a speed-time graph?

An upward line indicates accelerating movement.

How is acceleration represented on a speed-time graph?

The gradient represents acceleration.

What happens to the forces when an object moves at constant speed?

Forces are balanced when an object moves at constant speed.

What is the significance of Newton’s First Law?

An object remains at rest or in constant motion unless acted on by a resultant force.

In the Cantilever Experiment, what is the independent variable?

The independent variable is the pulling force.

What does a straight line through the origin in a graph signify?

A straight line through the origin indicates a direct proportionality.

What do you need to calculate mean in an experiment?

You need to collect data points and then calculate the average.