# Physics unit 1 section 1

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What is a scalar?
a quantity with just a magnitude
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What is a vector?
A quantity with a magnitude and direction
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Give 3 examples of a scalar
mass, temperature, length, speed
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give 3 examples of a vector
force, velocity, acceleration, momentum
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What rule do we use a lot when finding out vectors?
SohCahToa
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What is the equation for acceleration?
A = (v-u)/t
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What does the v stand for?
final velocity
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What does the u stand for?
initial velocity
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What does the 's' stand for in suvat?
Displacement
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What is displacement?
The shortest distance for two points
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What is free fall?
the motion of an object undergoing an acceleration of g
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What is the only force acting on someone in free fall?
weight
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what did Aristotle believe?
That heavier objects would accelerate to the ground faster than lighter ones
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What did Galileo believe ?
That all objects would accelerate towards the earth at the same rate, but air resistance effects it
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What experiment did Galileo use to test this?
Inclined slope, rolled a ball down a slope and measure how long it took with a water clock, he found the balls accelerate at a constant rate
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What did Galileo use a slope?
He found that it reduced the effects of air resistance
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In a displacement time graph, what does the gradient show?
velocity
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greater acceleration
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on a velocity time graph the gradient shows what?
acceleration
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How do you find the distance travelled on a velocity time graph?
Area under the curve
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## Other cards in this set

### Card 2

#### Front

What is a vector?

#### Back

A quantity with a magnitude and direction

### Card 3

#### Front

Give 3 examples of a scalar

### Card 4

#### Front

give 3 examples of a vector

### Card 5

#### Front

What rule do we use a lot when finding out vectors?