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Year 9 Science > Physics > Flashcards

Physics Flashcards

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1
Q

What are energy stores?

A

The capacity for doing work

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2
Q

Name as many energy stores as possible

A

Gravitational potential, Kinetic energy, Elastic potential, Electrostatic potential, Magnetic potential, Chemical potential, Thermal energy store

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3
Q

What objects have kinetic energy?

A

Moving ones

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4
Q

Which energy store decreases when a ball is dropped?

A

Gravitational potential energy store

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5
Q

What unit is work done measured in?

A

J / Joules

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6
Q

What is the equation for work done?

A

Work done = force * distance

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7
Q

How much energy is transferred if you push a cart 100m with a force of 50N?

A

W=fd 100m50N Work done = 5000J

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8
Q

What is work done?

A

The amount of energy transferred on an object in Joules

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9
Q

What is power?

A

The rate of work done

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10
Q

What is the equation for power?

A

Power = Work done
Time (s)

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11
Q

What is power measured in?

A

W / Watts

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12
Q

On a distance time graph, what does a curve upwards represent?

A

Acceleration

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13
Q

On a distance time graph, what does a sloped gradient represent?

A

Constant speed

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14
Q

On a distance time graph, what does a horizontal line represent?

A

A stop

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15
Q

On a distance time graph, what does a sloped line going down represent?

A

Constant speed back to the start

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16
Q

On a distance time graph, what does a curve downwards represent?

A

Deceleration

17
Q

What is acceleration?

A

How fast an object speeds up

18
Q

What is terminal velocity?

A

The maximum velocity an object can attain when falling

19
Q

How do you calculate acceleration?

A

Acceleration = change in velocity
Time

20
Q

What is Newton’s Third Law?

A

For every action there is an equal and opposite reaction

21
Q

Name a force that stops things from falling faster than terminal velocity

A

Air resistance

22
Q

What increases as speed does?

A

Air resistance

23
Q

How do you calculate acceleration on a distance time graph?

A

https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSG8yY131OK-m0GySLhsN-jLiUlBLksY23HCQ&s

24
Q

What is the difference between a scalar and vector quantity?

A

Scalar has QUANTITY and MAGNITUDE only. Vector has QUANTITY, MAGNITUDE and DIRECTION.

25
Q

Name some examples of vector quantities

A

Velocity, displacement, momentum, acceleration, force

26
Q

Name some examples of scalar quantities

A

Temperature, time, mass, speed, distance

27
Q

What is the equation for gradient?

A

Change in y
Change in x

28
Q

In terms of F=ma, what is the equation for acceleration?

A

Acceleration = (Final Velocity-Initial Velocity) / Time Taken

a= V-U
t

Year 9 Science (3 decks)

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