Paper 1 Equations

Question 1

What is the equation that involves weight, mass + gravitational field strength.

Answer 1

W [N] = m [kg] x g [N/kg]

Question 2

What is the equation that involves work done, force and distance?

Answer 2

W [J]= F [N] x S [m]

Question 3

What is the equation that involves the force applied to a string, spring constant and extension?

Answer 3

F [N]= k [N/m] x e [m]

Question 4

What is the equation for kinetic energy ?

Answer 4

Ek [J] = 0.5 x m [kg] x v^2(v squared). [m/s is the unit for speed]

Question 5

What is the equation for gravitational potential energy?

Answer 5

Eg [J]= m [kg] x g [N/kg] x h [m]

Question 6

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

Hint: ✖️

Answer 6

E [J]= P [W] x t [seconds]

Question 7

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

Hint: ➗️

Answer 7

• P [W]= w [J] ➗ t [seconds]
• Power = work done/time

Question 8

What is the equation for efficiency that involves useful output energy transfer and total input energy transfer?

Answer 8

Efficiency= useful output energy transfer➗total input energy transfer

Question 9

What is the equation for efficiency that involves useful power output and total power input?

Answer 9

Efficiency= useful power output➗total power output

Question 10

What is the equation for charge flow, current and time?

Answer 10

Charge flow= current x time

Q [C]= I [A] x t [seconds]

Question 11

What is the equation for voltage, current and resistance?

Answer 11

V [v] = I [A] x R [Ω]

Question 12

What is the equation for power, voltage and current?

Hint: poison ivy

Answer 12

P [W] = I [A] x V [v]

Question 13

What is the equation for power, (current^2) and resistance?

Answer 13

P [W]= I^2 [A] x R [Ω]

Question 14

What is the equation for energy transferred, charge flow and voltage?

Answer 14

E [J]= Q [C] x V [v]

Question 15

What’s the equation for density?

Answer 15

• Density = mass/volume
• ρ= m [kg]/v

Question 16

What’s the equation for elastic potential energy?

Answer 16

Ee [J]= 1/2 x k [N/m] x e^2 [m] (squared)

Question 17

What is the equation for specific heat capacity?

Answer 17

• Change in thermal energy= mass x specific heat capacity x temperature change
• E [J] = m [kg] x c [J/kg°c] x ΔΘ [°c]

Question 18

What is the equation for specific latent heat

Answer 18

E [J]= m [kg] x L [J/kg]