Equations

Question 1

Weight

Answer 1

Mass x gravitational field strength

Question 2

Work done

Answer 2

Force x distance

Question 3

Force applied to a spring

Answer 3

Spring constant x extension

Question 4

Distance traveled

Answer 4

Speed x time

Question 5

Acceleration

Answer 5

Change in velocity
—————————-
Time taken

Question 6

Resultant force

Answer 6

Mass x acceleration

Question 7

Momentum

Answer 7

Mass x velocity

Question 8

Kinetic energy

Answer 8

0.5 x mass x (velocity)2

Question 9

Gravitational potential energy

Answer 9

Mass x gravitational field strength x height

Question 10

Power

Answer 10

Energy transferred
——————————-
Time

Question 11

Power

Answer 11

Work done
——————
Time

Question 12

Efficiency

Answer 12

Useful output energy transfer
——————————————-
Total input energy transfer

Question 13

Wave speed

Answer 13

Frequency x wavelength

Question 14

Efficiency

Answer 14

Useful power output
——————————-
Total power input

Question 15

Charge flow

Answer 15

Current x time

Question 16

Potential difference

Answer 16

Current x resistance

Question 17

Power

Answer 17

Potential difference x current

Question 18

Power

Answer 18

(Current)2 x resistance

Question 19

Energy transferred

Answer 19

Power x time

Question 20

Energy transferred

Answer 20

Charge flow x potential difference

Question 21

Density

Answer 21

Mass
———-
Volume

Question 22

Pressure

Answer 22

Force normal to a surface
—————————————-
Area of that surface

Question 23

Pressure

Answer 23

Force normal to a surface
—————————————-
Area of that surface