Physics formula

Question 1

formula for Average speed

Answer 1

v= d/t

Average speed = distance / time

Question 2

formula for Average velocity

Answer 2

V= s/t

Average velocity = displacement / time

Question 3

formula for Acceleration

Answer 3

a = v-u/t

Acceleration = final velocity - Initial velocity / change in time

Question 4

formula for Force

Answer 4

F = m x a

Force = mass x acceleration

Question 5

formula for gravitational field strength

Answer 5

g = w/m

gravitational field strength = weight / mass

Question 6

formula for momentum

Answer 6

p = m x v

Momentum = Mass x Velocity

Question 7

formula for momentum

Answer 7

p = m x v

Momentum = Mass x Velocity

Question 8

formula for momentum

Answer 8

p = m x v

Momentum = Mass x Velocity

Question 8

formula for momentum

Answer 8

p = m x v

Momentum = Mass x Velocity

Question 9

formula for impulse

Answer 9

Ft = mv - mu

Impulse = change in momentum

Question 10

formation for conservation of momentum

Answer 10

total p before = total p after

Question 11

formula for moments

Answer 11

M = F x d

Moments = force x perpendicular distance to pivot

Question 12

formula for moments

Answer 12

M = F x d

Moments = force x perpendicular distance to pivot

Question 13

formula for Hooke’s law

Answer 13

F = k x e

Force = spring constant x extension

Question 14

formula for Hooke’s law

Answer 14

F = k x e

Force = spring constant x extension

Question 15

formula for Pressure

Answer 15

P = F/A

Pressure = Force / Area

Question 16

formula for Pressure in Liquid

Answer 16

^P = ρg ^h

Pressure = density x gravitational field strength x change in height.

Question 17

formula for Work done

Answer 17

W = Fd

Work done = force x distance moved in the direction of the force

Question 18

formula for Gravitational Potential

Answer 18

^Ep = mg x ^h

Gravitational potential = mass x gravitational potential x change in height

Question 19

formula for Kinetic Energy

Answer 19

Ek = 1/2 x mass x v 2

Kinetic energy = 1/2 x mass x velocity squared

Question 20

formula for Power

Answer 20

P = W/t

Power = work done / time

Question 21

formula for efficiency

Answer 21

Efficiency = useful output / Total output x 100

Question 22

formula for Gas Pressure

Answer 22

P1 x V1 = P2 x V2

Question 23

formula for Specific heat capacity

Answer 23

C = ^E / m x ^0

Specific heat capacity = energy change / mass x temperature change

Question 24

Formula for Wave speed

Answer 24

V = f x λ

Wave speed = Frequency x Wavelength

Question 25

Formula for Refractive Index

Answer 25

n = c / v

refractive index = Speed of light (vacuum)/ Speed of light (medium)

Question 26

Formula for Snell’s Law

Answer 26

n1 x sinθ1 = n2 x sinθ2

Question 27

Formula for Critical angle

Answer 27

n = 1 / sin C

Refractive index = 1 / sin Critical angle

Question 28

Formula for Electrical Current

Answer 28

I = Q / t

Current = Charge / time

Question 29

Formula for Potential difference

Answer 29

V = W / Q

P.d = Work done / charge

Question 30

Formula for e.m.f

Answer 30

E = W / Q

e.m.f = Work done / charge

Question 31

Formula for resistance

Answer 31

R = V / I

Resistance = P.d / Current