Formulas

Question 1

distance travelled = ?

Answer 1

average speed x time

Question 2

acceleration = ?

Answer 2

change in velocity / time taken

Question 3

force = ?

Answer 3

mass x acceleration

Question 4

weight = ?

Answer 4

mass x gravitational field strength

Question 5

momentum = ?

Answer 5

mass x velocity

Question 6

change in gravitational potential energy = ?

Answer 6

mass x gravitational field strength x change in vertical height

Question 7

kinetic energy = ?

Answer 7

half x mass x velocity^2

Question 8

efficiency = ?

Answer 8

useful energy transferred by the device / total energy supplied to the device

Question 9

wave speed = ?

Answer 9

frequency x wavelength (λ)

distance / time

Question 10

work done = ?

Answer 10

force x distance moved in the direction of the force

Question 11

power = ?

Answer 11

work done / time taken

Question 12

moment of a force = ?

Answer 12

force x distance normal to the direction of the force

Question 13

energy transferred = ?

Answer 13

charge moved x potential difference

Question 14

charge = ?

Answer 14

current x time

Question 15

electrical power = ?

Answer 15

current x potential difference

current^2 x resistance

Question 16

density = ?

Answer 16

mass / volume

Question 17

force exerted on a spring = ?

Answer 17

spring constant x extension

Question 18

pressure = ?

Answer 18

force normal to surface x area of surface

Question 19

potential difference = ?

Answer 19

current x resistance