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IGCSE Physics > Forces and Motion Part 1 > Flashcards

Forces and Motion Part 1 Flashcards

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1
Q

Unit for mass

A

Kilograms (kg)

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2
Q

Unit for length

A

Metres (m)

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3
Q

Unit for force

A

Newtons (N)

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4
Q

Unit for time

A

Seconds (s)

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5
Q

Equation to calculate average speed

A

average speed = total distance travelled/total time taken

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6
Q

Symbol equation to calculate speed

A

v=d/t

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7
Q

Steeper line on distance/time graph

A

Object is moving faster

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8
Q

Straight line on acceleration/time graph

A

Steady speed

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9
Q

Curve getting steeper on acceleration/time graph

A

Accelerating

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10
Q

Curve getting shallower on acceleration/time graph

A

Decelerating

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11
Q

First step to find speed using a distance/time graph

A

Determine gradient

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12
Q

Equation to find gradient

A

Gradient = Change in distance/Change in time

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13
Q

Forces: Vector or scalar

A

Vector

Magnitude and direction

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14
Q

Scalar quantities

A

Only have magnitude eg temperature

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15
Q

Examples of forces

A

Air resistance, friction, weight, thrust, magnetic, gravitational

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15
Q

Representing forces using arrows

A

Ruler, pencil
Head shows direction
Size shows moment

16
Q

Balanced forces

A

ZERO resultant force

Object remains stationary or moves at constant speed

17
Q

Unbalanced forces

A

Resultant force

Object accelerates or decelerates

18
Q

Friction

A

Measure it by measuring force needed to overcome

More mass, more friction

19
Q

Equation to find stopping distance

A

Stopping distance = thinking distance + braking distance

20
Q

Reaction time can be affected by

A 
Tiredness
Distractions 
Alcohol
Drugs
Speed
21
Q

The longer the reaction time, the …… the thinking distance

A

Longer

22
Q

Braking distance can be affected by

A 
Road conditions 
Weather
Condition of vehicle
Mass in vehicle
Speed
23
Q

Fixed point

A

Pivot/fulcrum

24
Q

Turning effect

A

Moment

25
Q

equation for moment

A

Moment = force * perpendicular distance

M=Fd

26
Q

Principle of moments

A

Object in equilibrium if Mcw = Macw

27
Q

Equation for weight

A

Weight =mass * gravitational pull

W=mg

IGCSE Physics (6 decks)

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