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Forces and speed revision > forces and speed > Flashcards

forces and speed Flashcards

1
Q

What is a force?

A

A force is a push or a pull.

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2
Q

What force slows me down?

A

Air resistance.

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3
Q

How can I reduce friction?

A

By lubricating the item and making it more streamlined.

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4
Q

What keeps things afloat?

A

Upthrust

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5
Q

What is weight?

A

Weight is a force. It measures the effect gravity is having on an object. Weight is measured in newtons.

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6
Q

What is mass?

A

Mass is the measurement of how much of something there is.

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7
Q

What is the equation for finding weight?

A

weight = mass times gravitational field strenght (newtons per kilogram)

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8
Q

How do you find density?

A

You do mass divided by volume.

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9
Q

How dense is water?

A

1g/cm3

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10
Q

What is the magnetic force?

A

The force between two magnets, or a magnet and a magnetic material.

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11
Q

What is the equation for finding speed?

A

speed = distance divided by time

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12
Q

What is the equation for finding distance?

A

distance = speed multiplied by time

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13
Q

What does balance mean?

A

Forces acting on the object are the same size but act in opposite directions.

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14
Q

What does deform mean?

A

Deform means to change shape.

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15
Q

What does unbalanced mean?

A

Forces that are not balanced.

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16
Q

What is air resistance?

A

Air resistance is the force of an object moving through the air that causes it to slow down.

17
Q

What are the characteristics of a streamlined shape?

A

1) rounded front
2) slowly tapering
3) smooth shape

18
Q

Is there more air resistance acting on a smooth shape or a bumpy shape?

A

There is more air resistance acting on the bumpy shape.

19
Q

What is a newton meter?

A

A piece of equipment used to measure weight in newtons.

20
Q

What is tension?

A

A stretching force.

21
Q

compress

A

To squash into a smaller space.

22
Q

Is gravity a non-contact force?

A

Yes.

23
Q

Weight drags you down. True or false?

A

True.

24
Q

Balloons float because the upthrust is greater than the weight. True or false?

A

True.

25
Q

If forces are balanced on a moving car are balanced, does it continue to move at the same speed or not?

A

The car continues to move at a constant speed.

26
Q

Does friction always oppose motion?

A

Yes, it always does.

Forces and speed revision (1 decks)

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