# Physics - unit 1 - Motion

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What is a Scalar?
A Quantity that has just a magnitute
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Give 3 examples of a scalar.
Temperature, Time, length, Speed and Energy.
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What is a Vector?
A quantity with has magnitude and a direction.
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Give 3 examples of a Vector.
Force, Velocity, Acceleration and momentum.
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What is it called when you add two or more Vectors?
Finding the resultant Vector.
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Only when can you add a vector?
When they are add right angles (perpendicular) to each other.
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What are the equations of constant acceleration called?
The SUVAT equations.
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What does each letter in SUVAT stand for?
S- displacement, U- initial velocity, V- final velocity, A- acceleration, T- Time taken.
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What is Free Fall?
The motion of on object undergoing an acceleration of gravity.
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What is the only force acting on an object in Free Fall?
weight (caused by gravity).
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Why is 'g' usually a negative figure?
It is usually going downwards.
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What is the value of 'g' with the unit?
9.81ms-2
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Give an example of when the acceleration would change from positive to negative.
When a ball is thrown up it would be positive and when it comes down it will be negative.
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What did Aristotle believe?
That heavier, more massive objects would fall towards the Earth faster than lighter ones.
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What did Galileo believe?
That all objects would fall at the same rate, but resistance was the reason the appeared not to fall at the same rate.
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What does gradient show in a distance time graph?
Velocity
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In a distance time graph, a steeper gradient means what?
A Larger acceleration.
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Is the curve straight of curved in a distance time graph?
Curved.
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What does the gradient tell you in a Velocity time graph?
Acceleration.
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What does the area under the graph represent on a velocity time graph?
The distance travelled.
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What happens in a velocity time graph if there is not a constant acceleration?
There will be a non constant gradient so a curved line.
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## Other cards in this set

### Card 2

#### Front

Give 3 examples of a scalar.

#### Back

Temperature, Time, length, Speed and Energy.

### Card 3

#### Front

What is a Vector?

### Card 4

#### Front

Give 3 examples of a Vector.

### Card 5

#### Front

What is it called when you add two or more Vectors?