Physics Equations

Question 1

Speed (m/s)

Answer 1

Distance(m) / Time(s)

Question 2

Acceleration (m/s squared)

Answer 2

Change in speed (m/s) / Time taken (s)

Question 3

Weight (N)

Answer 3

Mass (kg) * Gravitational field strength (N/kg)

Question 4

Density (kg/m cubed)

Answer 4

Mass (kg) / Volume (m cubed)

Question 5

Hooke’s law

Answer 5

Force (N) = Spring constant (N/m) * extension (m)

Question 6

Newton’s second law

Answer 6

Force (N) = Mass (kg) * Acceleration (m/s)

Question 7

Pressure (Pa)

Answer 7

Force (N) / Area (m squared)

Question 8

Work done (J)

Answer 8

Force (N) * Distance (m)

Question 9

Kinetic Energy (J)

Answer 9

1/2 * Mass(kg) * velocity squared (m/s)

Question 10

Gravitational potential Energy (J)

Answer 10

Mass (kg) * gravitational field strength (N/m) * Height (m)

Question 11

Power (W)

Answer 11

Energy (J) / Time (s)

Question 12

Efficiency (%) (J)

Answer 12

Useful energy output (J) / Energy input (J) * 100

Question 13

Efficiency (%) (W)

Answer 13

Useful Power output (W) / Power input (W) * 100

Question 14

Moment (Nm)

Answer 14

Force (N) * Perpendicular distance to force (m)

Question 15

Name 3 types of non renewable sources of energy.

Answer 15

Fossil fuels - coal, oil and natural gas.

Question 16

Name the eight forms of energy.

Answer 16

Kinetic
Potential
Electrical
Thermal
Chemical
Nuclear
Light
Sound