A string of length L is fixed at one end and carries mass M at the other end. It is rotated around a vertical axis as shown in figure. Net force on the mass M is:
Correct answer: B. Option B
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation
The correct answer is Option B. When mass M is rotated at the end of the string of length L, it experiences a centripetal force directed towards the center of the circular path. This force is necessary to keep the mass moving in a circle and is provided by the tension in the string, which counteracts the gravitational force acting on the mass. As a result, the net force on the mass is the centripetal force required for the circular motion.Options A, C, and D are incorrect because they do not accurately represent the net forces acting on the mass. They fail to take into account the necessary centripetal force and how it relates to the tension in the string and gravitational force.
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