Physic equations

Question 1

work done = force applied x ——–

Answer 1

distance moved along the line of action in force

Question 2

work done equation using units

Answer 2

Joules = newtons x meters

J=n x m

Question 3

kinetic energy( joules)= 1/2 x

Answer 3

mass(KG) x speed (M/S)

Question 4

what experminet do you use in order for you to be able to investigate kinetic energy stores and gravitational potentioal

Answer 4

roling a ball down a ramp showing the increase in speed will show the transfer of energy
from gravitational potentioal energy to kinetic energy

Question 5

what is useful energy and wasted energy

Answer 5

useful energy is when energy is transferred to what it should be
and wasted is energy transfered to something it shouldnt be

Question 6

energy transfer for including what is wasted and useful for a lightbulb

Answer 6

chemical energy - light and heat
light useul
heat wasteful

Question 7

efficenty equation

Answer 7

useful output energy transfered to supply
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total input energy to device

Question 8

power equation(x) = energy tranfer to applience (j)
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fill in x

Answer 8

time taken to be transfered and Watts (W)

Question 9

power wasted =

Answer 9

total power - useful power

Question 10

what makes a good insulator

Answer 10

1) the thermal conductivity being very low

2) the thickness of the insulator should be as thick as possible

Question 11

what parts of the infrared radiation get through the sun

Answer 11

infared radiation and visible light

Question 12

what type of radiation allows you to see in the dark and detects heat

Answer 12

infared radiation

Question 13

why is tin foil used to keep people warm

Answer 13

due to the fact it lets out a lot of heat so it keeps people very warm

Question 14

specific heat capacity is what

Answer 14

the amount of energy