circular motion unit 3

Question 1

where is centripetal acceleration directed towards

Answer 1

the centre of a circle

Question 2

why is it accelerating

Answer 2

from newtons first law if a particle is moving it will continue to move with constant velocity unless an external force is acted upon it and for a velocity to be constant the speed must be constant and no change in direction therefore if a particle is moving at a a steady speed around a circular path it must be accelerating because the velocity is changing direction (a= change in v/ r)

Question 3

where does resultant force act

Answer 3

centripetal force towards the centre of the circle f=ma, f(centripetal force)= mv2/r (a=v2/r)

Question 4

what is centripetal force

Answer 4

not a real force as friction gravitational tension….. has to provide it

Question 5

frequency

Answer 5

number of oscillations per second, Hz f=1/T

Question 6

period

Answer 6

time taken for one complete oscillation, s

Question 7

angular velocity ,w

Answer 7

the angle swept out by the radius in unit time, rads-1

Question 8

angular velocity , w equations

Answer 8

w=(theta)/t, w= 2(pi)/T, w=2(pi)f

Question 9

conversion equation for degrees to radians

Answer 9

2(pi)/360=1 degree

Question 10

conversion equation for radians to degrees

Answer 10

1 rad = 360/2(pi)

Question 11

newtons first law

Answer 11

if a particle is at rest it will remain stationary or if already moving will continue to move with constant velocity unless acted upon by an external force