Unit 3.1 Circular motion Flashcards
What is the equation for frequency?
What is the equation for angular velocity?
What is the definition for angular velocity?
Angle swept out by the radius in unit time.
How do you calculate the centripetal force?
Fc = M(V^2/r)
What is a period (T)?
Time taken for one complete circuit.
What is frequency (f)?
The number of circuits or cycles per second
What is simple harmonic motion?
When an object moves such that its acceleration is always directed toward a fixed point and is proportional to its distance from the fixed point.
What is the amplitude (A) of an oscillating object?
The maximum value of the object’s displacement (from its equilibrium position)
Definition of a phase?
The phase of an oscillation is the angle (ωt + ε) in the equation x =Acos (ωt + ε). [ε is called the phase constant.] UNIT: rad
What is are free oscillations?
Free oscillations occur when an oscillatory system (such as a mass on a spring, or a pendulum) is displaced and released.[The frequency of the free oscillations is called the system’s natural frequency.]
Damping
Damping is the dying away, due to resistive forces, of the amplitude of free oscillations.
Critical damping
Critical damping is the case when the resistive forces on the system are just large enough to prevent oscillations occurring at all when the system is displaced and released.
Forced oscillations
These occur when a sinusoidally varying ‘driving’ force is applied to an oscillatory system, causing it to oscillate with the frequency of the applied force.
Resonance
If, in forced vibrations, the frequency of the applied force is equal to the natural frequency of the system (e.g. mass on spring), the amplitude of the resulting oscillations is large. This is resonance.
Whats the equation for angular velocity if we are given the frequency?
2π/T
