Equations

Question 1

Force=

Answer 1

mass x acceleration

Question 2

kinetic energy=

Answer 2

1/2 x mass x (speed)^2

Question 3

Momentum=

Answer 3

mass x velocity

Question 4

energy transferred (work done)=

Answer 4

force x distance

Question 5

energy transferred=

Answer 5

power x time

Question 6

efficiency=

Answer 6

useful energy transferred / total energy transferred

Question 7

weight=

Answer 7

mass x gravitational field strength

Question 8

gravitational potential energy=

Answer 8

mass x height x gravitation field strength

Question 9

force exerted by a spring=

Answer 9

extension x spring constant

Question 10

speed=

Answer 10

distance / time

Question 11

acceleration=

Answer 11

change in speed / time taken

Question 12

wave speed=

Answer 12

frequency x wave length

Question 13

charge=

Answer 13

current x time

Question 14

potential difference=

Answer 14

current x resistance

Question 15

energy transferred electrically=

Answer 15

charge flow x potential difference

Question 16

density=

Answer 16

mass / volume

Question 17

pressure=

Answer 17

force normal to a surface / area of that surface

Question 18

potential difference=

Answer 18

work done (energy transferred) / charge

Question 19

power(W)=

Answer 19

Energy transferred(J) / time(S)

Question 20

power(W)

Answer 20

potential difference(V) x current(A)

Question 21

power(W)

Answer 21

current^2 x resistance

Question 22

force(N)

Answer 22

magnetic field strength x current x length of conductor

Question 23

average speed (m/s)=

Answer 23

distance(m) /time(s)

Question 24

acceleration(m/s^2)=

Answer 24

change in speed(m/s) / time taken (s)

Question 25

change of momentum(kg m/s)=

Answer 25

resultant force(N) x time for which it acts(s)

Question 26

moment of a force (Nm)=

Answer 26

force(N) x distance(m)