Oscillations

?
What is simple harmonic motion?
Periodic motion about an equilibrium position, whereby acceleration is proportional to displacement and acts towards equilibrium position.
1 of 18
What is a free oscillation?
Frequency of system is natural frequency.
2 of 18
What is a forced oscillation?
Force is applied continuously to the system. The frequency is that of the vibration force.
3 of 18
When displacement is 0, what is velocity and acceleration?
Velocity is maximum, acceleration is 0
4 of 18
When velocity is 0, what is displacement and acceleration?
Acceleration is maximum, displacement is maximum
5 of 18
When acceleration is 0, what is velocity and displacement?
Velocity is maximum, displacement is 0
6 of 18
Time period for a mass-spring system oscillating
2π√m/k
7 of 18
Time period for a pendulum system oscillating
2π√l/g
8 of 18
Natural frequency =
1/T
9 of 18
Where is kinetic energy maximum?
When displacement is 0
10 of 18
Where is potential energy maximum?
When displacement is maximum
11 of 18
What is damping?
Occurs when energy is transferred out of a system resulting in reduced amplitude
12 of 18
What is light damping?
When oscillations are reduced slowly
13 of 18
What is critical damping?
When oscillations are stopped in the quickest time possible
14 of 18
What is resonance?
Occurs when the frequency of a system is forced to be equal to the natural frequency of the system
15 of 18
What happens when resonance occurs?
Rate of energy transfer is maximum, driving force is π/2 out of phase and ahead of oscillations, amplitude is maximum
16 of 18
How does damping affect resonance?
Damping decreases the effect of resonance, and causes the natural frequency to decrease
17 of 18
Why are ductile materials used for damping?
They can undergo significant plastic deformation before breaking. Therefore it can absorb energy when being deformed.
18 of 18

Other cards in this set

Card 2

Front

What is a free oscillation?

Back

Frequency of system is natural frequency.

Card 3

Front

What is a forced oscillation?

Back

Preview of the front of card 3

Card 4

Front

When displacement is 0, what is velocity and acceleration?

Back

Preview of the front of card 4

Card 5

Front

When velocity is 0, what is displacement and acceleration?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Physics resources:

See all Physics resources »See all Simple harmonic motion resources »