Useful Physics Equations

Question 1

Speed (m/s)

Answer 1

Distance (m)/Time (s)

Question 2

Acceleration (m/s squared)

Answer 2

Change in velocity (m/s)/Time (s)

Question 3

Weight (n)

Answer 3

Mass (kg) X Gravitational field strength (n/kg)

Question 4

Change in GPE (j)

Answer 4

Mass (kg) X Gravitational field strength (n/kg) X Change in height (m)

Question 5

Momentum (kg m/s)

Answer 5

Mass (kg) X Velocity (m/s)

Question 6

Kinetic energy (j)

Answer 6

1/2 X Mass (kg) X Velocity^2 (m/s)

Question 7

Force (n)

Answer 7

Acceleration (m/s^2) X Mass (kg)

Question 8

Wave speed (m/s)

Answer 8

Frequency (hz) X Wavelength (m)

Question 9

Velocity (m/s)

Answer 9

V squared - U squared = 2 X acceleration X distance

Question 10

Work done (j)

Answer 10

Force (n) X Distance (m)

Question 11

Stopping distance (m)

Answer 11

Thinking distance (m)+Braking distance (m)

Question 12

Gravitational field strength with height and time (n/kg)

Answer 12

2 X height/t^2

Question 13

Force using momentum (n)

Answer 13

Change in momentum (kg m/s)/Time (s)

Question 14

Wavespeed (m/s)

Answer 14

Wavelength (m) X Frequency (hz)

Question 15

Efficiency (j)

Answer 15

Useful (j)/Total (j)