Physics Equations

Question 1

What is the equation for kinetic energy?

Answer 1

Kinetic energy = 0.5 x mass x (speed)^2
Ek = 1/2 m v^2

Question 2

What is the equation for gravitational potential energy?

Answer 2

Gravitational potentialenergy = mass x graviational field strength x hieght
Ep = m x gx x h

Question 3

What is the equation that links power and energy transferred?

Answer 3

Power= energy transferred/ time
P= E/t

Question 4

What is the equation which links power and work done?

Answer 4

Power = work do e/ time
P= W/t

Question 5

What is the equation which links efficiency and useful output energy transfer?

Answer 5

Efficiency = useful output energy transfer/ total input energy transfer

Question 6

What is the equation which links efficiency and useful power output?

Answer 6

Efficiency = useful power output / total power input

Question 7

What is the equation for charge flow?

Answer 7

Charge flow = current x time
Q = I t

Question 8

What is the eqaution that links potential difference and resistance?

Answer 8

potential difference = current × resistance
V = I R

Question 9

What is the equation which links power and potential difference?

Answer 9

Power = potential difference x currrent.
P = V I

Question 10

Which equation links power and resistance?

Answer 10

Power = ( current)^2 x resistance
P = I2 R

Question 11

Which equation links energy transfer and power?

Answer 11

Energy transferred = power x time
E = P t

Question 12

Which equation links energy transferred and charge flow?

Answer 12

energy transferred = charge flow × potential difference
E = Q V

Question 13

What is the equation for density?

Answer 13

Density = mass/volume
p=m/v

Question 14

What is the equation for gases?

Answer 14

For gasses: pressure x volume = constant
p V = constant

Question 15

What is the equation for weight?

Answer 15

Weight = Mass x gravitational field strength
W = m g

Question 16

What is the equation for work done?

Answer 16

Work done = force x distance (along the line of action of the force)
W= F s

Question 17

What is the equation for a force?

Answer 17

Force = spring constant x extension

Question 18

What is the equation for moment of a force?

Answer 18

Moment of a force = force x distance ( normal to direction of force)
M= F d

Question 19

What is the equation for pressure?

Answer 19

Pressure = force normal to a surface/ area of that surface
p = F / A

Question 20

What is the eqaution for distance travelled?

Answer 20

Distance travelled = speed x time
s = v t

Question 21

What is the equation for acceleration?

Answer 21

Acceleration = change in velocity / time taken
a = Δv/ t

Question 22

What is the eqaution for resulatant force?

Answer 22

Resultant force = mass x acceleration
F=m a

Question 23

What is the equation for momentum?

Answer 23

Momentum = mass x velocity
p = m v

Question 24

What is the equation for wave speed?

Answer 24

Wave speed = frequency x wavelength
v = f λ