Learning Path
Question & Answer1
Understand Question2
Review Options3
Learn Explanation4
Explore TopicChoose the Best Answer
A
Gravity
B
Friction
C
Tension
D
Normal Force
Understanding the Answer
Let's break down why this is correct
Answer
When an object slides down an inclined plane, the force that opposes its motion due to the interaction of the surfaces is called friction. Friction arises because the surfaces in contact have microscopic irregularities that interlock, resisting the relative motion between them. The magnitude of this force depends on the normal force pressing the surfaces together and on a material‑dependent coefficient of friction. For example, a block sliding down a 30‑degree slope will experience a frictional force equal to μ times the component of weight perpendicular to the slope, slowing its descent. Thus, friction is the resisting force that keeps the object from accelerating freely down the incline.
Detailed Explanation
Friction is a resisting force that works against motion. Other options are incorrect because Gravity pulls an object toward the Earth, but it does not push back against sliding; Tension is the pull inside a string or rope.
Key Concepts
Friction
Inclined Plane Dynamics
Forces in Motion
Topic
Friction
Difficulty
hard level question
Cognitive Level
understand
Practice Similar Questions
Test your understanding with related questions
1
Question 1If an object is sliding down an inclined plane and begins to slow down, what is the underlying cause of this deceleration?
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Question 2If a block is sliding down an inclined plane, how does the frictional force behave compared to the gravitational force acting parallel to the incline?
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3
Question 3When analyzing an object on an inclined plane, which factor most directly affects the frictional force acting on it?
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4
Question 4Which of the following statements about friction forces in a sliding object on an inclined plane are true? Select all that apply.
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Question 5An object is sliding down an inclined plane and eventually comes to a stop. What is the primary cause of the object's deceleration as it moves down the slope?
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