Flashcards in Circular motion and Oscillations Deck (11)
Define Centripetal acceleration
Acceleration of any object travelling in a circular path at constant speed, always acts towards the centre of a circle
Oscillation motion for which a is directly proportional to x and is directed towards some fixed point- characterised by a=-(w^2)X
Oscillations in which the kinetic energy is converted into other forms i.e. heat and so the amplitude of the
Define free oscillations
When an object oscillates without a driving force acting to keep it oscillating. Objects undergoing free
oscillations vibrate at their natural frequency
Define Natural frequency
The frequency of the free oscillations of a system
Define forced oscillations
Oscillation in which a periodic driver force is applied to an oscillator
Frequency with which a periodic driver is applied to a system in forced oscillation
When the driving frequency is equal to the natural frequency of an oscillating system. This causes a
dramatic increase in the amplitude of the oscillations.
How would you find F & V from whirling bung experiment? 5 marks
- Student tries to rotate bung at a constant radius
- Force F is calculated from F=mg, where m is mass of the slotted masses
- Measure time t for n revolutions of the bung
- Measure radius r when stationary
- Calculate v using 2PiR/t.
When would you use X=ACosWT?
When pendulum released from highest point and oscillations timed from that point.