Equations

Question 1

How do you find the gradient of a line

Answer 1

Gradient= Change in Y divided by the change in x

Question 2

How do you calculate kinetic energy

Answer 2

Kinetic energy = 1/2 x mass x speed2

Question 3

How do you calculate gravitational potential energy

Answer 3

G.p.e = mass x field strength x height

Question 4

Elastic potential energy

Answer 4

Elastic potential energy = 1/2 x spring constant x extension2

Question 5

Specific heat capacity

Answer 5

Change in thermal energy = mass x specific heat capacity c temperature change

Question 6

Power

Answer 6

Power = work done / time

Question 7

Efficiency

Answer 7

Efficiency = useful power output / total power output

Question 8

Charge

Answer 8

Charge = current x time

Question 9

Potential difference

Answer 9

Potential difference = Current x resistance

Question 10

Energy transferred in household appliances

Answer 10

Energy transferred = power x time

Question 11

Formula for SLH

Answer 11

Energy = mass x specific latent heat

Question 12

Force of a moving object

Answer 12

Force = mass x acceleration

Question 13

Force in a spring

Answer 13

Force = spring constant = extension

Question 14

Calculation for a moment

Answer 14

Moment = force x distance

Question 15

Pressure in a fluid

Answer 15

Pressure = force / area

Question 16

Acceleration

Answer 16

Acceleration = change in velocity / time