Physics equations (shhs)

Question 1

kinetic energy

Answer 1

0.5 x mass x (speed)²

Question 2

elastic potential energy

Answer 2

0.5 x spring constant x (extention)²

Question 3

Gravitational potential

Answer 3

mass x gravitational field stength x height

Question 4

change in thermal energy

Answer 4

mass x specific heat capacity x temp change

Question 5

Power

Answer 5

energy transferred / time

or

work done / time

Question 6

Efficiency

Answer 6

useful output energy transfer / total input energy transfer

or

useful power output / total power input

Question 7

charge flow

Answer 7

current x time

Question 8

potential difference

Answer 8

current x resistance

Question 9

power

Answer 9

(current) ² x ressistance

Question 10

energy transferred

Answer 10

power x time

or

charge flow x potential difference

Question 11

density

Answer 11

mass / volume

Question 12

energy for a change of state

Answer 12

mass x specific latent heat

Question 13

weight

Answer 13

mass x gravitational field strength

Question 14

work done

Answer 14

force x distance (moved along the line of action of the force)

Question 15

force

Answer 15

spring constant x extention

Question 16

distance

Answer 16

speed x time

Question 17

acceleration

Answer 17

change in velocity / time taken

Question 18

resultant force

Answer 18

mass x acceleration

Question 19

momentum

Answer 19

mass x velocity

Question 20

wave speed

Answer 20

frequency x wavelength

Question 21

force

(magnetism)

Answer 21

magnetic flux density x current x length