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science > forces and speed > Flashcards

forces and speed Flashcards

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1
Q

how do you calculate speed?

A

distance multiplied by time

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2
Q

what is the force pulling back at moving things?

A

friction

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3
Q

how do you define weight?

A

the force pulling you to the center of the earth.

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4
Q

how can friction be benefitting?

A

it keeps you from slipping and sliding

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5
Q

DEFINE mass

A

the relative weight of one

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6
Q

what do you call 2 equal forces

A

balanced

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7
Q

a KG of mass equals how many newtons

A

1

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8
Q

what is a newton meter?

A

a tool for measuring your weight

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9
Q

when you weigh yourself, what are you actually measuring?

A

your mass

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10
Q

would something roll better on a smooth or bumpy floor?

A

smooth

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11
Q

DEFINE buoyancy

A

the force that allows stuff to float

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12
Q

gravity

A

the force pulling you to the center of the earth

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13
Q

what generates thrust?

A

engines

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14
Q

what is a non contact force

A

a force that doesnt need things to touch

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15
Q

deform

A

to change shape

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16
Q

electrostatic force

A

a force that happens between two electronic objects

17
Q

tension

A

a streching force

18
Q

lubricate

A

a substance that reduces friction

19
Q

compress

A

to squash

20
Q

field

A

an area where something feels a force

21
Q

how do you calculate time

A

speed divided by distance

22
Q

how do you calculate distance

A

speed divided by time

23
Q

what do you measure density in

A

kg

24
Q

what do you measure speed in

A

miles or kilometers per second or hour

25
Q

what do you measure time in

A

seconds

26
Q

what do you measure distance in

A

miles or kilometers

27
Q

what do you measure weight in?

A

newtons

28
Q

when a plane is moving foward, what is the strongest force in play

A

thrust

29
Q

the lack of what force can make driving dangerous?

A

friction

30
Q

when skydiving, what is the strongest force in play?

A

gravity

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