Physics Equations

Question 1

Density =

Answer 1

Mass / Volume

Question 2

Distance Travelled =

Answer 2

Speed x Time

Question 3

Acceleration =

Answer 3

Change in velocity / Time

Question 4

Kinetic Energy =

Answer 4

0.5 x Mass x Speed2

Question 5

Force =

Answer 5

Mass x Acceleration

Question 6

MOMENTUM =

Answer 6

MASS X VELOCITY

Question 7

Work Done =

Answer 7

Force x Distance (along the line of action of the force)

Question 8

What is power?

Power (W) simple =

Answer 8

The rate at which energy is transferred.

Work Done / Time

Question 9

Force exerted by a string =

Answer 9

Extension x Spring constant

Question 10

Gravity Force =

Answer 10

Mass x GFS

Question 11

PRESSURE =

Answer 11

FORCE TO NORMAL SURFACE / AREA OF THAT SURFACE

Question 12

MOMENT OF A FORCE

Answer 12

FORCE X DISTANCE (normal to the direction of the force)

This means if you have a slanted long bit on the force multiplier (the long plant on seesaw) and the force was pointing directly upwards, you would have to calculate the distance so it is at a right angle to the force.

Question 13

Charge Flow =

Answer 13

Current x Time

Question 14

Potential Difference =

Answer 14

Current x Resistance

Question 15

Energy Transferred (J) =

Answer 15

Charge x Potential Difference

Question 16

Power (W) double =

Answer 16

Potential difference x Current

(Current)2 x Resistance

Question 17

Energy Transferred =

Answer 17

Power x Time

Question 18

Wave Speed =

Answer 18

Frequency x Wavelength

Question 19

Efficiency =

Answer 19

Useful output energy transfer / Input energy transfer

Question 20

What are accelerations about?

Answer 20

5m/s2

Question 21

What are forces in large accelerations about?

Answer 21

500N