equations

Question 1

weight= mass x gravitational field strength

Answer 1

or w = mg

Question 2

work done = force x distance (along the line of an acting force

Answer 2

or w= F s

Question 3

force = spring constant x extension

Answer 3

or f= k e

Question 4

moment of force = force x distance (normal to direction of force)

Answer 4

or m= F d
note not needed

Question 5

pressure = force normal to a surface/ area of that suffice

Answer 5

or p= f/a
note not needed

Question 6

distance traveled= speed x time

Answer 6

or s= v t

Question 7

acceleration= change in velocity/ time taken

Answer 7

or = delta v/ t

Question 8

resultant force= mass x acceleration

Answer 8

or f = m a

Question 9

momentum = mass x velocity

Answer 9

or p= m v

Question 10

force = change in momentum/ time taken

Answer 10

or m delta v/delta t

Question 11

wave speed = frequency x wavelength

Answer 11

or v= f lamba

Question 12

kinetic energy = 0.5 x mass x (speed)sq

Answer 12

or ek= 1/2 m v sq

Question 13

gravitational potential energy = mass x gravitational filed strength x height

Answer 13

or ep m g h

Question 14

power = energy transferred/time

Answer 14

or p= E/t

Question 15

power= work done/ time

Answer 15

or p= w/t

Question 16

efficiency= useful output energy transfer/ total input energy transfer

Answer 16

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Question 17

efficiency= useful power output/total power input

Answer 17

blank

Question 18

charge flow= current x time

Answer 18

Q = I t

Question 19

potential difference= current x resistance

Answer 19

or V = I R

Question 20

power= potential difference x current

Answer 20

p = VL

Question 21

power = (current)squared x resistance

Answer 21

or p=I squared R

Question 22

energy transferred = power x time

Answer 22

E = P t

Question 23

energy transferred = charge flow x potential difference

Answer 23

or E = Q v

Question 24

density = mass/volume

Answer 24

p= m/v