Equations

Question 1

KE

Answer 1

1/2mv^2

Question 2

GPE

Answer 2

mgh

Question 3

What links power and work done?

Answer 3

Power = Work done/time taken

Question 4

Efficiency

Answer 4

Useful output/ total input

Question 5

EPE

Answer 5

1/2ke^2

Question 6

Charge flow

Answer 6

Current x time Q=It

Question 7

Potential difference

Answer 7

Current x resistance V=Ir

Question 8

Total resistance

Answer 8

R=R1+R2

Question 9

What links power and potential difference?

Answer 9

Power = current x potential difference P=IV

Question 10

What links power and resistance?

Answer 10

Power = current^2 x resistance P=I^2R

Question 11

What links energy transferred and power?

Answer 11

Energy transferred = power x time E=pt

Question 12

What links energy transferred and charge flow?

Answer 12

Energy transferred = charge flow x potential E=QV

Question 13

Density

Answer 13

Mass ÷ volume

Question 14

How do you work out energy if you have the latent heat?

Answer 14

Energy = mass x latent heat

Question 15

Weight

Answer 15

Mass x gravity W=mg

Question 16

Work done

Answer 16

Force x distance W=fd

Question 17

Force concerning springs

Answer 17

Spring constant x extension F=ke

Question 18

Moment

Answer 18

Force x distance p=f

Question 19

Pressure

Answer 19

Force ÷ Area p=f÷n

Question 20

Distance concerning sdt

Answer 20

Speed x time d=st

Question 21

Acceleration

Answer 21

Change in velocity ÷ time taken a=(triangle)v/t

Question 22

Resultant force

Answer 22

Mass x acceleration f=ma

Question 23

Momentum

Answer 23

Mass x velocity p=mv