Learning Path
Question & Answer1
Understand Question2
Review Options3
Learn Explanation4
Explore TopicChoose the Best Answer
A
4 N
B
3 N
C
30 N
D
24 N
Understanding the Answer
Let's break down why this is correct
Answer
The kinetic friction force equals the coefficient of kinetic friction times the normal force. The normal force on the block is its weight, which is mass times gravity: 10 kg × 9. 8 m/s² = 98 N. Multiply that by the coefficient 0. 3 to get the frictional force: 0.
Detailed Explanation
The kinetic friction equals the friction coefficient times the normal force. Other options are incorrect because This choice assumes a much smaller friction force; This answer would fit if the coefficient were 0.03 or the block weighed only 10 N.
Key Concepts
Kinetic Friction
Normal Force
Topic
Friction Behavior Demonstration
Difficulty
medium level question
Cognitive Level
understand
Practice Similar Questions
Test your understanding with related questions
1
Question 1If a 10 kg box is resting on a flat surface with a coefficient of friction of 0.5, what is the maximum frictional force that can act on the box before it starts to slide?
easyPhysics
Practice
2
Question 2When a 15 kg block is placed on a rough surface where the coefficient of kinetic friction is 0.4, how does a significant increase in surface temperature affect the normal force and the friction acting on the block?
hardPhysics
Practice
3
Question 3You are analyzing a scenario where two blocks are placed on a surface, Block A has a mass of 5 kg and Block B has a mass of 0.4 kg. Both blocks experience different frictional forces against the same surface. Classify the following statements into correct categories regarding their friction coefficients: 1) The friction coefficient of Block A is greater than that of Block B. 2) The frictional force on Block B can be considered negligible compared to Block A. 3) The friction coefficient depends solely on the mass of the block. 4) The surface material affects the friction coefficient regardless of mass. Which statements belong to the category of 'Correct Understanding of Friction Coefficients'?
hardPhysics
Practice
4
Question 4A 5 kg block is sliding on a horizontal surface with a coefficient of kinetic friction of 0.3. If the block is pushed with a force of 20 N to the right, what is the final velocity of the block after 2 seconds, assuming it starts from rest? Consider both Newton's Laws and the conservation of momentum in your calculations.
hardPhysics
Practice
5
Question 5A 5 kg block is sliding on a horizontal surface with a coefficient of kinetic friction of 0.3. If the block is pushed with a force of 20 N to the right, what is the final velocity of the block after 2 seconds, assuming it starts from rest? Consider both Newton's Laws and the conservation of momentum in your calculations.
hardPhysics
Practice
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