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Work, Energy, and Power — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsWork, Energy, and Power1 Mark
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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