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Physics > Work And Time > Flashcards

Work And Time Flashcards

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1
Q

What are the units for energy?

A

Joules

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2
Q

How is energy transferred to a light bulb?

A

By electricity

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3
Q

How is energy transferred away from a light bulb?

A

By light, heat

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4
Q

Describe one other way in which energy can be transferred

A

By sound, forces

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5
Q

What is a force?

A

A push or a pull

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6
Q

What are the units for measuring force?

A

Newton’s

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7
Q

What is your weight?

A

The force of gravity pulling on you

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8
Q

What does work done mean in physics?

A

Energy transferred by a force

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9
Q

What does power measure?

A

How fast energy is transferred

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10
Q

What are the units for power?

A

Watts

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11
Q

What are the units for work done?

A

Joules

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12
Q

How do you calculate work done?

A

Force x distance moved in the direction of the force

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13
Q

How do you calculate power?

A

Work divided by time

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14
Q

Name two non contact forces

A

Gravity, magnetism

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15
Q

What is a magnetic field?

A

The space around a magnet where it can affect things

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16
Q

What is a vector quantity ?

A

A quantity that had both magnitude and direction

17
Q

Name two contact forces

A

Upthrust, air resistance

18
Q

Name three non- contact forces

A

Magnetism, gravity, static electricity

19
Q

How is a force represented in a diagram?

A

Arrow showing direction, with length indicating size

20
Q

Why is weight a vector quantity?

A

It has a direction as well as magnitude

21
Q

The earth attracts the moon via gravity. What is the other force in this action-reaction pair?

A

The moon attracting the Earth

22
Q

What is the name for the space around an object where it attracts things with mass?

A

A gravitational field

23
Q

What is the name for the space around something with an electric charge where it can affect other objects?

A

An electrostatic or electric field

24
Q

What is the name for a single force that represents the combined effects of all the forces on an object?

A

A resultant force

25
Q

What is the name for a diagram where a measurement on the diagram represents a larger measurement in real life?

A

A scale diagram

Physics (6 decks)

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