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:
it begins to move to the right! :)
I think the answer is c.if current decreases and everything else remains constant,then power will increase
Answer: 330 m
Explanation:
The speed of sound is defined as the distance traveled by the sound wave in a especific time :
Where:
is the speed of sound
is half the time the sound wave travels since the person speaks, the sound wave hits the hill and then returns to the person again as an echo
is the distance between the person and the hill
So, we have to find :
Finally:
No it cannot because you would have to test it over and over again to make sure it was correct the first time.