Question 81
A metre stick is balanced at its center normally. Two 5 g coins are placed at 12.0 cm mark, and balance point shifts to 45.0 cm. What is the mass of the stick?
Question 82
A circular hole of radius R/2 is cut from a uniform disk of radius R. The hole's center is at R/2 from the original center. Where is the center of mass of the remaining body?
Question 83
To maintain a rotor at 200 rad/s, an engine transmits 180 N·m torque. What is the power required? Assume 100% efficiency.
Question 84
A hollow cylinder of mass 3 kg and radius 40 cm is pulled by a rope with 30 N force. What is the linear acceleration of the rope? Assume no slipping.
Question 85
A hollow cylinder of mass 3 kg and radius 40 cm has a rope wound around it. If pulled with a force of 30 N, what is its angular acceleration?