Answer:
a. The laser tracking mechanism experiences a changing tangential velocity
c. The laser tracking mechanism experiences a non-zero angular acceleration
d. The laser tracking mechanism experiences a non-zero tangential acceleration
Explanation:
a. The laser tracking mechanism experiences a changing tangential velocity
This is because the tangential velocity v = rω where r = radius of disc and ω = angular speed of discs. Since r is constant, v ∝ ω.
Since the angular speed changes from 200 rpm to 500 rpm, thus, the tangential velocity would also change.
So, the laser tracking mechanism experiences a changing tangential velocity
c. The laser tracking mechanism experiences a non-zero angular acceleration
Since angular acceleration, α = Δω/Δt where Δω = change in angular speed and Δt = change in time.
Since there is a change in angular speed from 200 rpm to 500 rpm in time Δt, there is thus a non-zero angular acceleration.
So, The laser tracking mechanism experiences a non-zero angular acceleration
d. The laser tracking mechanism experiences a non-zero tangential acceleration
Since tangential acceleration, a = rα where r = radius of disc and α = angular acceleration.
Since there is an angular acceleration of the disc, there is thus going to be a tangential acceleration given by a = rα.
So, the laser tracking mechanism experiences a non-zero tangential acceleration
Statement b is false because, the disc experiences a changing angular speed from 200 rpm to 500 rpm.
