Equations Topics 1-4

Question 1

Equation for distance…

Answer 1

Distance = speed x time

Speed = distance/time

Time = distance/time

Question 2

Equation for acceleration…

Answer 2

Acceleration = change in velocity / time taken

A = (v-u)
—

Question 3

Equation for force…

Answer 3

Force = mass x acceleration
F = m x a

Mass = Force/acceleration
m= F/ a

Acceleration = Force / Mass
a = F/m

Question 4

Equation for weight…

Answer 4

Weight = mass x gravitational field strength
W = m x g

Mass = weight / gravitational field strength
m = w /g 

gravitational field strength = weight / mass
g = w/m

Question 5

Equation for momentum…

Answer 5

Momentum = mass x velocity
P = m x v

Mass = momentum / velocity
m = P/v

Velocity = momentum / mass
v = P/m

Question 6

Equation for kinetic energy…

Answer 6

Kinetic energy = 1/2 x mass x (speed)2

                             2 KE = 1/2 x m x V

Question 7

Equation for efficiency…

Answer 7

Efficiency = useful energy / Total energy

Question 8

Equation for Change in gravitational potential energy…

Answer 8

Change in gravitational energy = mass x gravitational field strength x change in vertices height

🔺GPE = m x g x 🔺h

Question 9

Equation for wave speed…

Answer 9

Wave speed = frequency x wavelength
V = f x /\

(small f for frequency big F for Force)

Frequency = wave speed / wavelength

Wavelength = wave speed / frequency