1.

A body of weight 20 N, mass 2 kg is moving in vertical circular motion with the help of a string of radius 1 m and with a velocity of 5 m/s. What is the tension in the string at the highest point?(a) 30 N(b) 50 N(c) 20 N(d) 25 NThe question was posed to me in examination.The doubt is from Uniform Circular Motion topic in division Motion in a Plane of Physics – Class 11

Answer»

Correct choice is (a) 30 N

To ELABORATE: At the highest point, the tension and the weight are in the same direction but the centrifugal force is in the opposite direction. Centrifugal force can be CALCULATED as mv^2/r = 50 N. HENCE the tension = centrifugal force-weight = 30 N.



Discussion

No Comment Found

Related InterviewSolutions