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Question 30227
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Laws of Motion and Friction: Pseudo Force — Non-inertial Frame MCQ

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Pseudo Force — Non-inertial FrameMediumQuestion 30227

Question

A coin lies on a car dashboard. When the car suddenly accelerates forward, the coin slides backward. In the car's reference frame, this is explained by:
  1. A
    Increased friction
  2. B
    Gravity pulling backward
  3. C
    A pseudo force acting backward
    Correct
  4. D
    Newton's third law

Correct answer

A pseudo force acting backward

Explanation

In the accelerating car frame (non-inertial), a pseudo force = −ma acts on all objects in the direction opposite to the car's acceleration.

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