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physics year 10 > topic 1 - energy > Flashcards

topic 1 - energy Flashcards

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1
Q

what is potential energy?

A

the maximum power something has to store energy

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2
Q

GPE formula?

A

GPE = mgh

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3
Q

Gravitational potential energy equation, with units?

A

Gravitational potential energy (J) = mass (kg) x height (m) x gravitational field strength (N/kg)

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4
Q

Elastic potential energy definition?

A

Energy stored in an object when its stretched or squashed/when a force is applied

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5
Q

Elastic potential energy formula?

A

EPE = 1/2kx²

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6
Q

Elastic potential energy, what do k, and x stand for?

A

k: spring constant (N/m
x: extension (m)

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7
Q

state 2 ways to increase elastic potential energy?

A

stretching elastic or applying pressure

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8
Q

how to find k (EPE)?

A

to find k we use: k= force in newtons/extension in m

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9
Q

what are the units for elastic potential energy?

A

Elastic potential energy is measured in joules

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10
Q

name 3 objects with GPE?

A

a book on a shelf, lifting a pen, clock on a wall

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11
Q

what is kinetic energy?

A

kinetic energy = energy gained when something moves

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12
Q

anything moving = ??

A

anything moving = kinetic energy

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13
Q

explain why identical objects at the same height would have different gpe’s on different planets?

A

because diff planets = diff gravitational field strength which effects its gpe

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14
Q

KE= ??

A

KE= 1/2 mv²

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15
Q

units for kinetic energy formula?

A

KE= J, mass = kg, velocity = m/s

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16
Q

formula for kinetic energy, with units?

A

Kinetic energy (J) = 1/2 x mass (kg) x velocity² (m/s) only velocity is squared

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17
Q

when something starts to move it gains ______, this is called _____?

A

when something starts to move it gains energy, this is called kinetic energy

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18
Q

work done = f x ??

A

work done = force x distance

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19
Q

equation for work done, with units?

A

Work done (J) = force (newtons) x distance (metres)

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20
Q

what is “work done” measured in?

A

work done is measured in Joules (J)

21
Q

what is meant by “work done”?

A

work done= energy transferred per second by moving an object

22
Q

unit for power?

A

power = Watts (W)

23
Q

equation for power, with units?

A

Power (W) = work done (J)/ time taken (s)

24
Q

distance equation?

A

distance = work done/force

25
Q

force equation?

A

force = work done/distance

26
Q

unit for mass?

A

the unit for mass is kg

27
Q

equation to find weight?

A

weight = mass x gravitational field strength

28
Q

unit of energy?

A

the unit of energy is Joules (J)

29
Q

unit for power, work done and time with correct capitals/lowercasing?

A

Watts (W) = power
Joules (J) = work done
seconds (s) = time

30
Q

unit for force?

A

the unit for force is Newtons (N)

31
Q

unit for spring constant?

A

the unit for spring constant is N/m

32
Q

unit for gravitational field strength?

A

N/kg (take as 10 if not given)

33
Q

unit for speed?

A

the unit for speed is m/s

34
Q

kinetic energy word equation?

A

Kinetic energy = 0.5 x mass x speed²

35
Q

unit for time?

A

the unit for time is s

36
Q

unit for distance?

A

the unit for distance is m

37
Q

unit for power?

A

Watts (W) or J/s (because 1 watt = 1 joule per sec)

38
Q

Power equation?

A

Power = energy transferred/ time = work done /time

39
Q

Work done equation?

A

Work done = force x distance

40
Q

EPE equation?

A

EPE= 0.5 x spring constant x extension²

41
Q

GPE equation?

A

GPE= mass x gravitational field strength (10 or 9.8) x height

42
Q

mass to weight equation?

A

mass x gravitational field strength (10) on earth

43
Q

Gravitational potential energy meaning?

A

Gravitational potential energy is energy gained by an object raised above the ground

44
Q

Elastic potential energy meaning?

A

energy stored in a stretched spring is elastic potential energy

45
Q

what is Kinetic energy?

A

Kinetic energy is energy stored in a moving object

46
Q

1 watt = ??

A

1 watt = 1 Joule per second

47
Q

work done meaning?

A

energy transferred PER SECOND by moving an object

48
Q

What does SCERSAU stand for?

A

Summarise
Conversions?
Equation
Rearrange
Substitute
Answer
Unit

49
Q

What parts of SCERSAU do you get marks for?*

A

Summarise
CONVERSIONS*
Equation
Rearrange
SUBSTITUTE*
ANSWER*
UNIT*

physics year 10 (1 decks)

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