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year 9 science > Motion > Flashcards

Motion Flashcards

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1
Q

When is the thrust greater than the friction?

A

During acceleration

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2
Q

What is a scalar quantity?

A

A quantity that has magnitude but not direction

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3
Q

Scalar quantity examples

A

Mass, distance, energy and speed

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4
Q

What is magnitude?

A

Size

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5
Q

What do vectors have?

A

Magnitude and direction

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6
Q

Acceleration is a…

A

vector quantity

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7
Q

A car goes around a roundabout at a constant speed. Why is its velocity changing?

A

It is changing direction

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8
Q

Temperature is a…

A

Scalar

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9
Q

Velocity is a…

A

vector

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10
Q

What is displacement

A

The distance in a straight line

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11
Q

Displacement is a…

A

vector

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12
Q

What represents the magnitude of a vector?

A

The length of the arrow

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13
Q

What does a horizontal line on a distance time graph show?

A

Stationary object

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14
Q

How do you calculate acceleration from a velocity time graph?

A

Gradient of the graph

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15
Q

What are the units for acceleration?

A

meters per second squared

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16
Q

What is the equation for calculating acceleration?

A

change in velocity divided by time

17
Q

What two things are needed for calculating speed?

A

Distance and time

18
Q

How do you calculate distance?

A

Speed multiplied by time

19
Q

What is instantaneous speed

A

The speed at one particular moment in a journey

20
Q
A

year 9 science (7 decks)

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