Physics Rotational & Circular Motion SZABMU 2022
PMDC Verified Question 50 of 95
Which one of the following provides centripetal force in a circular motion of body?
A
Vertical component of weight
B
Horizontal component of weight
C
Weight of the body
D
Force of friction
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Force of friction
Concept:

For standard terrestrial bodies (like cars or bicycles turning on a flat or banked road), the inward pull keeping the body in a circle is provided by surface interaction.

Solution:

  • Gravity acts straight down, so weight cannot provide a sideways centripetal force on a perfectly flat surface.
  • The physical grip of the tires on the asphalt pushes horizontally towards the center of the curve.
  • This grip is the force of friction.


Why other options are incorrect:

  • Option A, Option B, Option C are incorrect because weight points toward Earth's center, not horizontally into the curve of a flat turn.

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