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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