A wheel of mass 500 kg and 1 m diameter makes 500 revolutions per minute. Assuming the mass to be concentrated
along the rim, calculate the angular velocity of wheel.

w=120rpm        

Considering  it  a  disc

L=Iw

=220×(412)×120×602π

=31.415kgm/s

false

explanation:

boats, things on boats luggage are way more heavy then water.

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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