A mass attached to a string that is itself attached to the ceilin… - Vidyadip

MCQ

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
$B$
✓
$C$
D
$D$

✓

Answer

Correct option: C.

$C$

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

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