Equations

Question 1

Density

Answer 1

Mass /volume

Question 2

Average velocity

Answer 2

Change in displacement /time

Question 3

SUVAT without s

Answer 3

V = u+at

Question 4

SUVAT without a

Answer 4

S= 1/2 (u+v)t

Question 5

SUVAT without t

Answer 5

V^2=U^2 +2AS

Question 6

Thinking distance

Answer 6

Speed x reaction time

Question 7

Force

Answer 7

Mass x acceleration

Question 8

Weight

Answer 8

Mass x g

Question 9

Torque

Answer 9

Force x distance

Question 10

Pressure

Answer 10

Force / area

Question 11

Pressure in liquids

Answer 11

Height x density of liquid x g

Question 12

Work done

Answer 12

Force x distance

Question 13

Power

Answer 13

Work done / time

Question 14

Definition of power

Answer 14

The rate of work done

Question 15

Hookes law

Answer 15

F=Kx
F proportional to X(the extension)

Question 16

Stress

Answer 16

Force / cross sectional area

Question 17

Strain

Answer 17

Extension / Og length

Question 18

Youngs modulus

Answer 18

Tensile Stress /tensile strain

Question 19

Momentum

Answer 19

Mass x velocity

Question 20

Newton’s second law

Answer 20

The net force acting on object directly proportional to rate of change of momentum

Question 21

Moving power equation -constant force & constant velocity

Answer 21

P = Force x velocity

Question 22

Potential difference =

Answer 22

Work done / charge

Question 23

What is relationships between intensity and amplitude?

Answer 23

Intensity = amplitude squared

Question 24

What is the eq of intensity?

Answer 24

Intensity = power / area

Question 25

What is intensity formula from a source?

Answer 25

Intensity = power / 4piRs^2

Question 26

Pressure in fluids

Answer 26

Pressure in fluid = density of liquid x g x height of the liquid