Motion, Forces, and Energy Formulas

Question 1

Speed

Answer 1

distance ÷ time

Question 2

Acceleration

Answer 2

change in velocity ÷ time

Question 3

Force

Answer 3

mass × acceleration

Question 4

Momentum

Answer 4

mass × velocity

Question 5

Change in momentum

Answer 5

force × time

Question 6

Density

Answer 6

mass ÷ volume

Question 7

Weight

Answer 7

mass × g(gravitational field strength)

Question 8

Moment

Answer 8

force × perpendicular distance from point

Question 9

Load

Answer 9

spring constant × extension

Question 10

Pressure

Answer 10

force ÷ area

Question 11

Boyle’s law

Answer 11

Pressure¹ × Volume¹ = Pressure² × Volume²

Question 12

Work done

Answer 12

force × distance

Question 13

Energy

Answer 13

force × distance

Question 14

Gravitational Potential Energy

Answer 14

mass × gravitational field strength × distance

Question 15

Kinetic Energy

Answer 15

½ × mass × (velocity)²

Question 16

Efficiency

Answer 16

(useful work done ÷ total energy output)
OR
(useful energy output ÷ total energy output)
OR
(useful power output ÷ total power output)

Question 17

Power

Answer 17

(work done ÷ time taken)
OR
(energy transformed ÷ time taken)

Question 18

Useful Power Output

Answer 18

force × speed

Question 19

Pressure

Answer 19

density × gravitational field strength × depth