Learning Path
Question & Answer1
Understand Question2
Review Options3
Learn Explanation4
Explore TopicChoose the Best Answer
A
The gravitational force is decreasing
B
The normal force is increasing
C
Frictional force is acting against the motion
D
The object's mass is increasing
Understanding the Answer
Let's break down why this is correct
Answer
The object slows because friction between the object and the inclined surface pushes back against its motion. This friction force arises from tiny bumps and irregularities on both surfaces that resist sliding. As the object moves, kinetic energy is converted into heat, so the speed gradually decreases. For example, a toy car sliding down a ramp slows as its wheels rub against the metal rail, turning motion into heat. Thus, the deceleration is caused by the friction force opposing the motion.
Detailed Explanation
Friction is the force that pushes against the motion of an object on a surface. Other options are incorrect because It is easy to think that gravity must lessen to slow the object, but the pull of gravity stays the same while the object is on the incline; The normal force is the push from the surface that balances part of the object's weight.
Key Concepts
Friction
Inclined Plane Dynamics
Force Analysis
Topic
Friction
Difficulty
medium level question
Cognitive Level
understand
Practice Similar Questions
Test your understanding with related questions
1
Question 1When an object is sliding down an inclined plane, the force that opposes its motion due to the interaction of the surfaces is known as ___.
hardPhysics
Practice
2
Question 2If a block of wood slides down an incline and experiences lower friction than expected, what could be a likely cause for this observation?
mediumPhysics
Practice
3
Question 3Which of the following statements about friction forces in a sliding object on an inclined plane are true? Select all that apply.
hardPhysics
Practice
4
Question 4An 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?
mediumPhysics
Practice
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