Equations

Question 1

Moment of force calc

Answer 1

M= f X d

Question 2

Pressure calc

Answer 2

Pressure= Force / area

Question 3

Weight calc

Answer 3

Force= mass(kg) X GFS (N/m)

Question 4

Pressure in liquid calc

Answer 4

Pa= h(m) X p(kg/M3) X GFS(N/kg)

Question 5

Work Done

Answer 5

w.d = force × distance along the line of action of the force

Question 6

Force applied to a spring

Answer 6

force applied to a spring = spring constant × extension

Question 7

Distance travelled

Answer 7

distance travelled = speed × time

Question 8

Acceleration

Answer 8

acceleration = change in velocity/change in time

Question 9

Resultant force

Answer 9

resultant force = mass × acceleration

Question 10

Momentum

Answer 10

momentum = mass × velocity

Question 11

KE

Answer 11

kinetic energy = 0.5 × mass × speed^2

Question 12

GPE

Answer 12

gravitational potential energy = mass
× gravitational field strength g × height

Question 13

Power

Answer 13

P = work done/change in time

Question 14

Efficiency energy

Answer 14

efficiency = useful output energy transfer/ total input energy transfer

Question 15

Efficiency power

Answer 15

efficiency = useful power output/total power input

Question 16

Wave speed

Answer 16

wave speed = frequency × wavelength

Question 17

Charge flow

Answer 17

charge flow = current × time

Question 18

PD

Answer 18

potential difference = current × resistance

Question 19

Power

Answer 19

power = potential difference × current

Question 20

Power

Answer 20

power = current^2 × resistance

Question 21

Energy Transferred

Answer 21

energy transferred = power × time

Question 22

Energy Transferred

Answer 22

energy transferred = charge flow × potential difference

Question 23

Density

Answer 23

density = mass/ vol