Question

At which position in vertical circular motion is the tension in the string minimum?

(a) At the highest position

(b) At the lowest position

(c) When the string is horizontal

(d) At an angle of 35° from the horizontal

This question was addressed to me in final exam.

I'm obligated to ask this question of Uniform Circular Motion in section Motion in a Plane of Physics – Class 11

Answer 1

The correct option is (a) At the highest position

To elaborate: When the body is at the highest point of its motion. This is because at the highest point the tension = centrifugal force – weight. This is the minimum value for tension throughout the motion.