EQUATIONS 🤑

Question 1

formula for weight

Answer 1

mass x gravitational field strength

Question 2

formula for work done

Answer 2

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

Question 3

formula for distance travelled

Answer 3

speed x time

Question 4

formula for acceleration

Answer 4

change in velocity / time taken

Question 5

formula for resultant force

Answer 5

mass x acceleration

Question 6

formula for momentum

Answer 6

mass x velocity

Question 7

formula for kinetic energy

Answer 7

0.5 x mass x velocity squared

Question 8

formula for gravitational potential energy

Answer 8

mass x gravitational field strength x height

Question 9

formula for power (1)

Answer 9

energy transferred / time

Question 10

formula for power (2)

Answer 10

work done / time

Question 11

formula for efficiency (1)

Answer 11

useful output energy transfer / total input energy transfer

Question 12

formula for efficiency

Answer 12

useful power output / total power input

Question 13

formula for wave speed

Answer 13

frequency x wavelength

Question 14

formula for charge flow

Answer 14

current x resistance

Question 15

formula for potential difference

Answer 15

current x resistance

Question 16

formula for power (3)

Answer 16

potential difference x current

Question 17

formula for power (4)

Answer 17

current squared x resistance

Question 18

formula for energy transferred (1)

Answer 18

power x time

Question 19

formula for energy transferred (2)

Answer 19

charge flow x potential difference

Question 20

formula for density

Answer 20

mass / volume

Question 21

formula for force applied to a spring

Answer 21

spring constant x extension