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Physics > Forces > Flashcards

Forces Flashcards

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1
Q

units for distance

A

metres

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2
Q

units for mass

A

kg

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3
Q

units for speed

A

m/s

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4
Q

units for acceleration

A

m/s2

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5
Q

units for time

A

seconds

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6
Q

what is a physical quantity

A

something that can be measured

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7
Q

what is an independent variable

A

the thing that is changed

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8
Q

what is a dependent variable

A

the thing that is measured

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9
Q

what is a control variable

A

the things that are kept the same

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10
Q

what is an annomaly

A

a result that does not fit the pattern

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11
Q

define accuracy

A

how close your measurement is to the true value

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12
Q

define precision

A

the spread of values around the mean

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13
Q

define scalar quantity

A

size but no direction

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14
Q

define vector quantity

A

both size and direction

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15
Q

define force

A

a push or pull

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16
Q

define contact forces

A

Forces that can only act when objects are touching

17
Q

define non contact forces

A

Forces that can act even when objects are not touching

18
Q

What is a force?

A

a push or pull

19
Q

State four examples of contact forces

A

friction air resistance, tension and normal contact force

20
Q

Name three example of non-contact force

A

gravitational force, electrostatic force and magnetic force

21
Q

What is weight?

A

The force acting on an object due to gravity pulling on its mass

22
Q

What is mass?

A

the amount of matter an object contains

23
Q

Write the equation linking weight, mass and gravitational field strength

A

weight = mass x gravitational field strength

24
Q

Name the equipment used to measure weight (forces)

A

A Newtonmeter

25
Q

Where does the weight of any object act from?

A

the centre of mass

26
Q

Define ‘resultant force’

A

A single force found by adding up all of the individual forces acting on an object

Physics (10 decks)

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