Equations

Question 1

What is the equation for density?

Answer 1

Mass/Volume

Question 2

Equation for speed?

Answer 2

Distance/time

Question 3

Equation for wavespeed?

Answer 3

Frequency x Wavelength

Question 4

Equation for Weight?

Answer 4

Gravity x Mass

Question 5

Equation for Work Done?

Answer 5

Force x Distance

Question 6

Kinetic energy?

Answer 6

0.5 x Mass x (velocity)2

Question 7

Power (potential difference involved)

Answer 7

Potential Difference x current

Question 8

Power (work done involved)

Answer 8

Work done / time

Question 9

Charge Flow?

Answer 9

Current x time

Question 10

Power? (Energy transferred)

Answer 10

Energy transferred/time

Question 11

Efficiency (transfer)

Answer 11

Useful output energy transfer/ total input energy transfer

Question 12

Efficiency

Answer 12

Useful power output/ total power input

Question 13

Power (resistance related)

Answer 13

(Current)2 x resistance

Question 14

Energy transferred?

Answer 14

Power x time

Question 15

Resultant force

Answer 15

Mass x acceleration

Question 16

Gravitational potential energy

Answer 16

Gravitational field strength x height

Question 17

Momentum

Answer 17

Mass x velocity

Question 18

Acceleration

Answer 18

Change in velocity/time taken

Question 19

Pressure

Answer 19

Force normal to a surface/area of the surface

Question 20

Force applied to a spring?

Answer 20

Spring constant x extension

Question 21

Moment of a force?

Answer 21

Force x distance(normal to direction of force)

Question 22

What do you know the Earth’s gravity to be?

Answer 22

9.8N/Kg

Question 23

Frequency for a wave?

Answer 23

number of times a point on the wave oscilates /per second