formulai

Question 1

kinetic energy

Answer 1

0.5 x mass x speed*2

Question 2

elastic potential

Answer 2

0.5 x spring constant x extension*2

Question 3

units for spring constant

Answer 3

newtons per metre

Question 4

units for extension

Answer 4

metres

Question 5

gravitational potential energy

Answer 5

mass x gravitational field strength x height

Question 6

units for height

Answer 6

meters

Question 7

units for gravitational field strength

Answer 7

newtons per meter

Question 8

thermal energy

Answer 8

mass x specific heat capacity x temperature change

Question 9

units for specific heat capacity

Answer 9

joules per kilogram per degrees celcius

Question 10

power

Answer 10

power = energy transferred / time

power = work done / time

power = force x distance / time

power =current x voltage

power = (current)*2 x resistance

Question 11

units for power

Answer 11

watts

Question 12

units for time

Answer 12

seconds

Question 13

formula for efficiency

Answer 13

• useful power output / total power input

                         or

• useful energy output / total energy input

Question 14

Power 2

Answer 14

power = energy transferred / time

power = work done / time

power = force x distance / time

power =current x voltage

power = (current)*2 x resistance

Question 15

weight mass and gravitational field strength

Answer 15

weight = mass x grav field strength

Question 16

weight

Answer 16

mass x gravitational field strength

Question 17

work done

Answer 17

work done = force x distance along line of action of force

Question 18

the force applied to a spring

Answer 18

spring constant x extension

Question 19

charge flow

Answer 19

current x time

Question 20

charge flow units

Answer 20

Coulombs / c

Question 21

voltage

Answer 21

current x resistance

Question 22

total resistance in a circuit

Answer 22

resistance of component one + resistance of component 2

Question 23

power 3

Answer 23

power = energy transferred / time

power = work done / time

power = force x distance / time

power =current x voltage

power = (current)*2 x resistance

Question 24

power 4

Answer 24

power = energy transferred / time

power = work done / time

power = force x distance / time

power =current x voltage

power = (current)*2 x resistance

Question 25

energy transferred

Answer 25

• power x time
• charge flow x voltage

Question 26

density

Answer 26

density = mass / volume

Question 27

units for current

Answer 27

a

Question 28

velocity / speed units

Answer 28

m/s

Question 29

resistance units

Answer 29

ohms - omega horseshoe shape

Question 30

force units

Answer 30

newtons / n

Question 31

power units

Answer 31

w / watts