Equations

Question 1

Distance traveled

Answer 1

Average speed x time

Question 2

Acceleration

Answer 2

Change in velocity / time

Question 3

Resultant force

Answer 3

Mass x acceleration

Question 4

Weight

Answer 4

Mass x GPE

Question 5

Momentum

Answer 5

Mass x velocity

Question 6

Wave speed

Answer 6

Frequent x wavelength

Question 7

Efficiency

Answer 7

Useful energy transferred by device / total energy supplied

Question 8

Kinetic energy

Answer 8

0.5 x mass x (speed)2

Question 9

Change in gravitational potential energy

Answer 9

Mass x gravitational field strength x change in height

Question 10

Work done

Answer 10

Force x distance (moved in direction of force)

Question 11

Power

Answer 11

Work done or energy transferred / time taken

Question 12

Energy transferred

Answer 12

Charge moved x potential difference

Question 13

Charge

Answer 13

Current x time

Question 14

Potential difference

Answer 14

Current x resistance

Question 15

Electrical power

Answer 15

Current x potential difference

Question 16

Electrical power

Answer 16

Current2 x resistance

Question 17

Density

Answer 17

Mass / volume

Question 18

Force exerted on a spring

Answer 18

Spring constant x extension

Question 19

Moment of a force

Answer 19

Force x distance

Question 20

Pressure

Answer 20

Force normal to the surface / area of that surface