Equations - Paper 2 Flashcards
1
Q
Distance travelled?
A
Speed x time
S = v t
2
Q
Acceleration?
A
Change in velocity / time taken
a = v - u / t
3
Q
Wave speed?
A
Frequency x wavelength
V = f x wavelength
4
Q
Period?
A
1 / frequency
5
Q
Newton’s 2nd Law?
A
Acceleration = force / mass
a = F / m
6
Q
Weight?
A
Mass x gravitational field strength
w = m g
7
Q
Work done?
A
Force x distance moved
W = F D
8
Q
Hooke’s law?
A
Force = spring constant x spring extension
F = k e
9
Q
Efficiency?
A
Useful energy / Energy put in x100
E= useful/input x100
10
Q
Velocity²?
this is on the formula sheet
A
Initial velocity² + 2 x Acceleration x Displacement
v²=u²+2as
(this is on the formula sheet)
11
Q
Elastic potential energy?
this is on the formula sheet
A
1/2 x Spring constant x Extension²
Ee=1/2ke²
(this is on the formula sheet)
12
Q
Momentum?
A
Mass x Velocity
m = m x v
