1464Civil EngineeringMedium
A hoop of radius 3 m weighs 100 kg. It rolls along a horizontal floor so that at its centre of mass has a speed of 200 mm/sec,. The work required to stop the hoop is________?
A8 J
B4 J
C2 J
D6 J
Correct answer
B. 4 J
Explanation
The correct answer is 4 J.