Further Mechanics Flashcards
1
Q
What direction does centripetal force and acceleration act?
A
Towards the centre
2
Q
What is the equation for R at the top of a vertical circle?
A
R=(mv^2/r)-mg
3
Q
What are the two requirements for SHM?
A
The acceleration is proportional to the displacement AND is always in the opposite direction to the displacement
4
Q
What is the effect of damping?
A
Damping reduces the amplitude but does not affect the period time
5
Q
What are forced vibrations?
A
They occur when an external periodic force is applied to the system
6
Q
When does resonance occur?
A
When the driving frequency matches the natural frequency of the system.
7
Q
What does resonance cause?
A
The amplitude of the vibrations will become very large (bad bridge design)
