1. Simple Harmonic Motion
When a family of 4 people with a total mass of 200 kg step into a 1200 kg car, the car’s springs compress an additional 3.0 cm.
a) What is the spring constant of the
car’s springs (assume they act as a
single spring)
b) How far will the spring compress if loaded with 300 kg?

2. 1) Constructive interference occurs wherever a crest (thick line) meets a crest or a trough (thin line) meets a trough; this type of interference results in the formation of an 
anti-nodal
2) Destructive interference occurs wherever a crest meets a trough; this type of interference results in the formation of a 
nodal
3) The difference in distance from the two sources for every point on the 1st antinodal is 
1 λ
4) The difference in distance from the two sources for every point on the 1st nodal is 
1/2 λ

3. Reflection 15.0 cm A How far along the segment AB will the ray strike?

4. Interactions at Boundaries
How do reflected transverse and longitudinal waves behave at each of the following boundaries:
Transverse wave at a fixed end.
1800 phase angle change
00 phase angle change
2) Longitudinal wave at a free end.
3) Transverse wave moving to a more rigid medium.
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