P1 ENERGY

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

Front (Question)

equation for kinetic energy?

Back (Answer)

1/2 x mass x (velocity)² energy = j mass = kg velocity = m/s

Front (Question)

equation for elastic potential energy?

Back (Answer)

1/2 x spring constant x (extension)² energy = j spring constant = n/m extension = m

Front (Question)

equation for gravity potential energy?

Back (Answer)

mgh mass=kg energy = j gravitational field strength = n/kg height = m

Front (Question)

define specific heat capacity?

Back (Answer)

the amount of energy needed to raise the temperature of 1kg of a substance by 1 degree celsius.

Front (Question)

unit for specific heat capacity?

Back (Answer)

joules/degree celsius/kilogram

Front (Question)

power meaning?

Back (Answer)

the rate at which energy is transferred

Front (Question)

two equations of power?

Back (Answer)

power = energy transferred/time power = work/done

Front (Question)

power unit?

Back (Answer)

watt (w)

Front (Question)

two motors lift the same mass through the same height. motor a does this is half time of motor b. which dissipates the most power?

Back (Answer)

motor a the energy transferred is the same but time taken is less

#10

Front (Question)

describe the energy changes involved when a ball is thrown upwards and then returns to its starting position. ignore air resistance

Back (Answer)

upwards: ke is converted to gpe peak : maximum gpe, zero ke downwards : gpe is converted to ke

#11

Front (Question)

describe the energy transfer for a bungee jumper?

Back (Answer)

when falling the gpe is converted to ke of the jumper. as the cord tightens, ke is converted and stored as elastic potential energy. at lowest point , the jumper’s initial gpe equals the epe stored in the cloud.

#12

Front (Question)

explain why a bungee jumper slows down once the cord begins to stretch.

Back (Answer)

ke decreases since its converted to elastic potential energy. since ke is proportional to velocity² , as ke decreases so does velocity

#13

Front (Question)

examples of chemical energy store?

Back (Answer)

food, fuel , batteries

#14

Front (Question)

4 different stores of energy?

Back (Answer)

kinetic energy gravitational potential energy elastic potential energy chemical energy

#15

Front (Question)

kinetic energy?

Back (Answer)

energy stored in moving object.

#16

Front (Question)

elastic potential energy?

Back (Answer)

A force acting on an object may cause the shape of an object to change.

#17

Front (Question)

gravitational potential energy?

Back (Answer)

energy stored in an object due to its position above the earths surface.

#18

Front (Question)

equation for specific heat capacity?

Back (Answer)

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

#19

Front (Question)

law of conservation of energy?

Back (Answer)

energy can be transferred usefully , stored or dissipated but it cannot be created or destroyed

#20

Front (Question)

what is a system?

Back (Answer)

an object or a group of objects

#21

Front (Question)

what is closed system?

Back (Answer)

no energy can enter or leave

#22

Front (Question)

state any changes in the total energy of a ball that is kicked assuming that no external forces act

Back (Answer)

total energy of the system remains constant due to the conservation of energy.

#23

Front (Question)

what is waste energy?

Back (Answer)

energy that is not usefully transferred or transformed.

#24

Front (Question)

describe the energy changes that occur in a filament light-bulb

Back (Answer)

electrical energy is transferred into light and heat energy. light is a useful energy form , heat is waste energy