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

Rajasthan 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
    C
  • D
    D
✓

Answer

  1. C

Explanation:

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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