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

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