Harmonic motion

Question 1

Define a radian

Answer 1

One radian is the angle subtended at the centre of a circle by an arc of length equal to the radius of the circle

Question 2

Define angular speed

Answer 2

Angular speed is the rate of change of angular displacement

Question 3

Define centripetal force

Answer 3

The resultant force, towards the centre of a circle, acting on an object moving in a circular path

Question 4

Define centrifugal force

Answer 4

jk thats not a thing

Question 5

define shm

Answer 5

for a body in shm, the acceleration and restoring force is proportional to the displacement from the equilibrium position, and always directed towards equilibrium position, opposite from direction of displacement

Question 6

Define damping

Answer 6

The reduction in amplitude of oscillations over time due to presence of dissapative forces such as friction or drag - the total energy of the system decreases as energy is passed to the surroundings as thermal energy

Question 7

what is light damping

Answer 7

system oscilates with steadily decreasing amplitude, period is independent of amplitude

Question 8

what is critical damping

Answer 8

systen returns to equilibrium position without oscillating in shortest possible time

Question 9

what is heavy damping

Answer 9

same as critical but much slower- doesnt oscillate, returns to equilibrium position

Question 10

define resonance

Answer 10

when driving frequency matches the natural frequency of oscillator, maximum energy is transfered and maximum value of amplitude is reached