Answer:
a)
, b)
, c)
, 
Explanation:
a) The angular motion is obtained by integrating the angular acceleration function twice:



The angular motion when t = 2 s. is:


b) Let be
the distance between A and the rotation axis, measured in meters. The magnitude of the angular velocity when t = 2 s. is:


Finally, the magnitude of the velocity is:

c) The angular acceleration of the disk when t = 2 s. is:


Lastly, the normal and tangential components at point A are, respectively:





Use Newton's second law. The net force on the hero is
∑ <em>F</em> = <em>T</em> - <em>m g</em> = <em>m</em> (2.00 m/s²)
where
• <em>T</em> = tension in the rope
• <em>m</em> = 75.0 kg = mass of the hero
• <em>g</em> = 9.80 m/s² = acceleration due to gravity
Solve for <em>T</em> :
<em>T</em> = (75.0 kg)<em> </em>(<em>g</em> + 2.00 m/s²) = 885 N
Answer:
12 years
Explanation:
12 years is correct because how long is Jupiter one year is 12 years
Kinetic, thermal and electrical. There is more then one form of energy