Equations - Paper 2

Question 1

Pressure?

Answer 1

Force / area

P = F/A

Question 2

Distance travelled?

Answer 2

Speed x time

S = v t

Question 3

Acceleration?

Answer 3

Change in velocity / time taken

a = v - u / t

Question 4

Wave speed?

Answer 4

Frequency x wavelength

V = f x wavelength

Question 5

Period?

Answer 5

1 / frequency

Question 6

Newton’s 2nd Law?

Answer 6

Acceleration = force / mass

a = F / m

Question 7

Weight?

Answer 7

Mass x gravitational field strength

w = m g

Question 8

Work done?

Answer 8

Force x distance moved

W = F D

Question 9

Hooke’s law?

Answer 9

Force = spring constant x spring extension

F = k e

Question 10

Efficiency?

Answer 10

Useful energy / Energy put in x100

E= useful/input x100

Question 11

Velocity²?

this is on the formula sheet

Answer 11

Initial velocity² + 2 x Acceleration x Displacement

v²=u²+2as

(this is on the formula sheet)

Question 12

Elastic potential energy?

this is on the formula sheet

Answer 12

1/2 x Spring constant x Extension²

Ee=1/2ke²

(this is on the formula sheet)

Question 13

Transformer?

this is on the formula sheet

Answer 13

Np/Ns = Vp/Vs

this is on the formula sheet

Question 14

Moments?

Answer 14

M = F x d

Question 15

Pressure at a certain depth due to the column of liquid above?

(this is on the formula sheet)

Answer 15

Pressure = depth x field strength x density

p=hρg

(this is on the formula sheet)

Question 16

Momentum?

Answer 16

Mass x Velocity

m = m x v

Question 17

Force (in terms of momentum)?

this is on the formula sheet

Answer 17

Change in momentum / time taken

F = ΔP / Δt

(this is on the formula sheet)