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physics paper 1 > energy changes in a system > Flashcards

energy changes in a system Flashcards

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1
Q

what is the law of conservation

A

energy can not be created or destroyed , only transformed into another type of energy

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2
Q

what is the formula to find kinectic energy

A

kinetic energy = 1/2 x mass x velocity squared

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3
Q

what is the symbol equation for kinetic energy

A

Ek = 1/2 x m x v squared

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4
Q

what is kinetic energy measured in

A

joules

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5
Q

what is mass measured in

A

kg

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6
Q

what is velocity measured in

A

m/s

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7
Q

what is the formula for elastic potential energy

A

elastic potential = 1/2 x spring constant x extension squared

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8
Q

what is the symbol equation for elastic potential energy

A

Ee= 1/2 x k x e squared

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9
Q

what is elastic potential energy measured in

A

joules

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10
Q

what is spring constant measured in

A

n/m

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11
Q

what is extension measured in

A

m

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12
Q

what is the formula for gravitational potential energy

A

gravitational potential energy = mass x gravitational field strength x height

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13
Q

what is gravitational potential energy measured in

A

joules

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14
Q

what is mass measured in ( for grav. pot. energy)

A

kg

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15
Q

what is gravitational field strength measured in

A

9.8 N/kg

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16
Q

what is height measured in ( for grav.pot. energy)

A

m

17
Q

what is the formula for change in thermal energy

A

change in thermal energy = mass x specific heat capacity x change in temperature

18
Q

what is the symbol equation for gravitational potential energy

A

Ep= m x g x h

19
Q

what is the symbol equation for change in thermal energy

A

triangleE = m x c x triangleanglesign

20
Q

what is change in thermal energy measured in

A

joules

21
Q

what is mass measured in ( for change in thermal energy)

A

kg

22
Q

what is specific heat capacity measured in

A

J/kg degreescelcius

23
Q

what is change in temperature measured in

A

degreescelcius

24
Q

what is the symbol equation for power(2)

A

p = e or v /t

25
Q

what is the formula for power (2)

A

power = energy transferred or work done /time

26
Q

what is power measured in

A

watts

27
Q

what is energy transferred measured in ( for power equation)

A

joules

28
Q

what is time measured in ( for power equation)

A

seconds

29
Q

what is the formula for power(1)

A

power = potential difference x current

30
Q

what is potential difference measured in

A

volts

31
Q

what is current measured in

A

amps

32
Q

what is the symbol equation for power(1)

A

p = v x I

33
Q

what is the formula for power(3)

A

power = current squared x resistance

34
Q

what is resistance measured in

A

ohms

physics paper 1 (7 decks)

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