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Forces > Forces > Flashcards

Forces Flashcards

1
Q

if forces on an object are equal then…

A

it is stationary or moving at a constant speed.

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2
Q

speed=

A

distance/time

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3
Q

time=

A

distance/speed

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4
Q

distance=

A

time x speed

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5
Q

the characteristics of a streamlined shape are

A

rounded front, slowly tapering tail, smooth shape with no projections

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6
Q

gold has a density of

A

19.3 n

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7
Q

density=

A

mass/volume

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8
Q

mass is measured in

A

grams it is the amount of something there is.

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9
Q

weight is measured in

A

newtons (n) how heavy it is

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10
Q

weight=

A

mass x gravitational field strength

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11
Q

mass=

A

weight/gravitational field strength

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12
Q

gravitational field strength=

A

weight/mass

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13
Q

a force is

A

any interaction that, when unopposed, will change the motion of an object.

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14
Q

air resistance

A

a force acting against any object moving through the Earth’s atmosphere

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15
Q

friction

A

the force between two surfaces sliding over one another causing them to heat up and wear

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16
Q

upthrust

A

a force pushing upwards on an object in a liquid

17
Q

thrust

A

a push caused by an engine

18
Q

push/pull

A

a force exerted to move an object away or towards another object

19
Q

weight

A

the force that pulls objects towards the centre of the earth

20
Q

lift

A

a force pushing upwards on an object in the air.

21
Q

what is a newton meter

A

a newton meter is a tool used to measure weights in newtons.

22
Q

what is gravity

A

a non-contact force that acts between 2 masses

23
Q

what 2 phrases will get you the death penalty in Mrs Blackwell’s classroom (1)

A

Fair test

24
Q

what 2 phrases will get you the death penalty in Mrs Blackwell’s classroom (2)

A

Valid experiment

25
Q

when is something balanced

A

When forces that are acting upon an object are equal in size but act in opposite direction

26
Q

when is something unbalanced

A

When the forces that are acting upon the object are of unequal strength (but are still acting in opposite direction)

27
Q

name 3 non-contact forces

A

A magnetic force, an electrostatic force, or a gravitational force.

28
Q

What will happen when the forces acting upon an object are unbalanced?

A

it will move in a direction either accelerating deaccelerating

29
Q

how many newtons are in 100 grams

A

1N

30
Q

what is special about objects that float

A

they weigh nothing in water

Forces (1 decks)

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