A hook of radius 2m weighs 100kg. It rolls along a horizontal floor so that its centre if mass has a speed of 20cm/s. How much work has to be done to stop it? a) 5 J b) 6 J c) 2 J d) 4 J
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A hook of radius 2m weighs 100kg. It rolls along a horizontal floor so that its centre if mass has a speed of 20cm/s. How much work has to be done to stop it?
a) 5 J
b) 6 J
c) 2 J
d) 4 J
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- The angular velocity of a pulley of mass m and radius R changes with time w(t) = 60e-0.02t (rad/s). How m any cycles does the pulley make until it stops? Take =3. A) 150 В) 200 С) 125 D) 100 E) 500A 78.0 kg hoop rolls along a horizontal floor so that its center of mass has a speed of 0.0720 m/s. How much work must be done on the hoop to stop it?I need help with this problem please
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