Equations

Question 1

What is the equation linking power, energy transferred and time?

Answer 1

Power = Energy Transferred / Time
P = E/t

Question 2

What is the equation linking power, work done and time?

Answer 2

Power = Work Done / time P = W/t

Question 3

What is the equation for Kinetic Energy?

Answer 3

Kinetic Energy = 0.5 x mass x velocity squared

Question 4

What is the equation for elastic potential energy?

Answer 4

Elastic potential energy = 0.5 x spring constant x extension squared

Question 5

What is the equation for gravitational potential energy?

Answer 5

Energy transferred = Mass x Gravitational Field Strength x Height.

Question 6

What is the equation for efficiency?

Answer 6

Useful power output / total power input

Question 7

What is the equation for Hooke’s Law?

Answer 7

Force applied to a spring = spring constant x extension F = k e

Question 8

What is the equation linking Charge and Current?

Answer 8

Charge flow = Current x Time Q = It

Question 9

What is the equation linking power, current and resistance?

Answer 9

Power = Current squared x Resistance P =I2 x R

Question 10

What is the equation linking energy, charge and voltage?

Answer 10

Energy Transferred = Charge Flow x Potential Difference E = QV

Question 11

What is the equation linking energy transferred, power and time?

Answer 11

Energy Transferred = Power x Time
E=Pt

Question 12

What is the equation linking density, mass and volume?

Answer 12

Density = mass / volume p = m/v

Question 13

What is the equation for specific heat capacity?

Answer 13

Energy transferred = mass x specific heat capacity x change in temperature

Question 14

What is the equation linking potential difference, current and resistance

Answer 14

Potential difference = current x resistance
V = IR

Question 15

What is the equation linking power, current and voltage?

Answer 15

Power = current x voltage
P = IV

Question 16

What is the equation that links thermal energy for a change of state, mass and specific latent heat

Answer 16

Energy for a Change of State = Mass x Specific Latent Heat

Question 17

In gases what is constant?

Answer 17

Pressure x Volume = Constant
p1 x V1 = p2 x V2

Question 18

Which equation links weight, mass and gravitational field strength

Answer 18

Weight = Mass and Gravitational Field Strength

Question 19

Which equation links Work Done, Force, Distance?

Answer 19

Work Done = Force x Distance

Question 20

What is the Moment of a force?

Answer 20

Moment of Force = Force x Distance
M = Fd

Question 21

What is the equation for Pressure

Answer 21

Pressure = Force / Area

Question 22

What is the pressure due to a column of liquid

Answer 22

height of column x Density of liquid x gravitational field strength
P = hρg

Question 23

What is the equation linking distance, speed and time

Answer 23

Distance = Speed x Time
s = vt

Question 24

What is the equation linking time, velocity and acceleration

Answer 24

Acceleration = Change in velocity / Time
a = ∆v / t

Question 25

Equation linking acceleration, velocity and distance

Answer 25

Final Velocity ² - Initial Velocity ² = 2 x Acceleration x Distance
v² - u² = 2as

Question 26

Equation linking Force, mass and acceleration

Answer 26

Force = mass x acceleration
F = ma

Question 27

Equation linking momentum, mass and velocity

Answer 27

Momentum = mass and velocity
P = mv