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forces > forces test > Flashcards

forces test Flashcards

1
Q

what two things can be happening to an object happen when the resultant force is 0

A

moving at a constant speed and stationary

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2
Q

to start a mass moving do u need to reduce or increase the force as the ramp gets steeper

A

reduce

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3
Q

force that slows down moving objects

A

friction

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4
Q

why are many moving objects designed streamlined

A

so they will be less affected by air resistance

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5
Q

what is a fluid

A

a a substance with no fixed shape, a gas or a liquid

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6
Q

units of pressure

A

n/m squared

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7
Q

why do some objects sink

A

weight is more than upthrust

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8
Q

equation for fluid pressure

A

force/surface area

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9
Q

equation for fluid pressure

A

force/surface area

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10
Q

what happens to pressure in a fluid

A

the deeper you go the greater the pressure

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11
Q

what is the pressure exerted by a man standing on one leg

A

twice the pressure he exerts standing on 2 legs

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12
Q

100 N spread over 0.5m what is the pressure

A

200 n/m squared

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13
Q

snow shoe or drawing pin increases pressure

A

pin

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14
Q

high heel or lying flat reduce pressure

A

lying flat

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15
Q

pressure triangle

A

force at the top, surface area to the ;ft, pressure to the right

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16
Q

calculate force

A

pressure x area

17
Q

calculate area

A

force/pressure

18
Q

calculate pressure

A

force/area

19
Q

when 2 variables are graphed and show a straight line which goes through the origin and they can be directly proportional

A

linear relationship

20
Q

single force which can replace all the forces acting on an object and has the same effect

A

resultant force

21
Q

changing shape due to a force

A

deformation

22
Q

pressure caused by the weight of the air above

A

atmospheric pressure

23
Q

force opposing motion which is caused by the interaction of surfaces moving over one another

A

friction

24
Q

force extending or pulling apart

A

tension

25
Q

forces squashing or pushing together

A

compression

26
Q

the upward force that a liquid or gas exerts on a body floating in it

A

upthrust

27
Q

equilibrium

A

state of an object when opposing forces are balanced

28
Q

contact force

A

a force that acs by direct contact

29
Q

speed

A

distance/time

forces (1 decks)

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