Question

A mass attached to a string that is itself attached to the ceiling swings back and forth. If the bob is observed to be moving upward at a given instance, as shown to the right, which arrow best depicts the direction of the net force acting on the bob at that instant

• A. A
• B. B
• C. C
• D. D

Answer 1

The correct option is C C

Two forces act on the bob. (i) is the tension in the string and the (ii) mg sin $\theta$, which will be tangential to the path. The resultant of both the forces will be along vector C
Thus the correct option is (c)