What is the difference between speed and velocity?

Speed is just how fast you're going (e.g. 20 m/s) - the direction doesn't matter. Velocity is the speed in a given direction, e.g. 20 m/s north.

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What do flat sections represent in a distance-time graph?

It shows where the object is stationary - it's stopped.

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What do straight uphill (/) or downhill (\) sections represent in a distance-time graph?

They show that the object is travelling at a constant speed.

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What do curves represent in a distance-time graph?

Curves show a change in speed.

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What does acceleration mean?

Acceleration is how quickly the velocity is changing. This change in velocity can be a change in speed or a change in direction or both.

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What is the equation for acceleration?

Acceleration = Change in Velocity / Time taken

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What do flat sections represent in a velocity-time graph?

Flat sections shows the object is travelling at a steady speed.

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What do uphill sections represent in a velocity-time graph?

Acceleration.

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What does a curved graph in a velocity-time graph represent?

A curved graph means the object has a changing velocity.

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Define gravitational force.

Gravitational force is the force of attraction between all masses.

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What is the difference between weight and mass?

Mass is the amount of something in an object. The mass of an object never changes - no matter where it is in the universe. Weight is caused by the pull of the gravitational force. Weight is a force measured in newtons. Mass in not a force.

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What is the formula for mass, weight and gravity?

Weight = mass x gravitational field strength.

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What is resultant force?

The overall force of an object.

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What does a resultant force mean?

It means that there's a change in velocity and the object will move.

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What happens if the resultant force on a stationary object is zero?

The object will remain stationary.

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What happens if there is no resultant force on a moving object?

It'll just carry on moving at the same velocity.

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What happens if the resultant force is not zero?

The object will accelerate in the direction of the force.

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What is the equation for resultant force?

Resultant force = mass x acceleration.

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What is resultant force measured in?

Newtons.

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What happens when two objects interact?

The forces they exert on each other are equal and opposite.

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Other cards in this set

Card 2

Front

What is the difference between speed and velocity?

Back

Speed is just how fast you're going (e.g. 20 m/s) - the direction doesn't matter. Velocity is the speed in a given direction, e.g. 20 m/s north.

Card 3

Front

What do flat sections represent in a distance-time graph?

Back

Card 4

Front

What do straight uphill (/) or downhill (\) sections represent in a distance-time graph?

Back

Card 5

Front

What do curves represent in a distance-time graph?

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