Which of the following statements is true for movement on a plane with friction?I. Acceleration is a function of applied force onlyII. More force is needed to accelerate a stationary object than an identical moving objectIII. The force of friction is independent of the mass of objects
Correct answer: B. II only
- A. I only
- B. II only
- C. I and II only
- D. I and III
Explanation
The correct answer is Option B: II only. This is because a greater force is required to overcome static friction to start moving a stationary object than to keep it moving once in motion. Statement I is incorrect because acceleration is affected by both the applied force and the frictional force. Statement III is incorrect because the force of friction does depend on the mass of the object, as it influences the normal force exerted on the surface.
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