a. The disk starts at rest, so its angular displacement at time
is

It rotates 44.5 rad in this time, so we have

b. Since acceleration is constant, the average angular velocity is

where
is the angular velocity achieved after 6.00 s. The velocity of the disk at time
is

so we have

making the average velocity

Another way to find the average velocity is to compute it directly via

c. We already found this using the first method in part (b),

d. We already know

so this is just a matter of plugging in
. We get

Or to make things slightly more interesting, we could have taken the end of the first 6.00 s interval to be the start of the next 6.00 s interval, so that

Then for
we would get the same
.
Answer:
The second one is correct.
Explanation:
=
True because on side is heavier than the other
Answer:
Part a)

Part b)

Part C)
This is loss in terms of thermal energy due to collision with the floor
Explanation:
Part a)
Since we know that the ball rises up by 65% of initial height
so after first bounce it will lose 35% of its initial energy
so we will have

Energy Loss = 0.35 mgH[/tex]


Part b)
Energy of the ball after first bounce

energy of ball after 2nd Bounce

energy of the ball after 3rd bounce



Now we will have energy loss in fourth bounce given as



Part C)
This is loss in terms of thermal energy due to collision with the floor