Physics formulas

Question 1

Formula for constant motion (v)

Answer 1

V = S/T

Question 2

Formula for acceleration (a)

Answer 2

Gradient

Question 3

How to find total distance in speed/time graph

Answer 3

Area of a rectangular shaped graph = base × height Area of triangular shaped graph = ½ × base × height

Question 4

Formula for weight (w)

Answer 4

w = m × g

Question 5

Formula for density (p is rhoo)

Answer 5

p = m/v

Question 6

What is terminal velocity?

Answer 6

Weight of an object (downward motion) = air resistance (upward motion)

Implies no net force, therefore no acceleration, constant velocity

Question 7

Hooke’s law

Answer 7

F = k × x

Question 8

Formula for movement of a force

Answer 8

f × d

Question 9

Law of moment or equilibrium

Answer 9

Total clockwise movement = total anti-clockwise movement

Question 10

Power in watts (W)

Answer 10

p (W) = work done/time taken
p (W) = Energy transfer/time taken

Question 11

Efficiency

Answer 11

Useful output/total energy input × 100

Question 12

Atmospheric perssure?

Answer 12

P=760mmHg = 76cm Hg =1.01x105Pa

Question 13

Pressure in Pascals (pa)

Answer 13

P = F/A

Question 14

Pressure due to a liquid

Answer 14

p = p×g×h

Question 15

Energy sources?

Answer 15

Hydroelectric - Dam, waterfall
Geothermal - Pipes bored deep into the earths crust to extract heat from the earths core
Solar - Solar panels
Wind - Wind turbines
Tidal/Wave - Tidal turbines

Question 16

What is Boyle’s law?

Answer 16

pressure and volume are inversely proportional

Question 17

What s Charle’s Law?

Answer 17

V o l u m e i s d i r e c t l y p r o p o r t i o n a l t o absolute temperature

Question 18

What s Charle’s Law?

Answer 18

V o l u m e i s d i r e c t l y p r o p o r t i o n a l t o absolute temperature