All Categories
Alerts
Wishlist
Cart
Sign In
Categories
Current Affairs & GK
Current Affairs
Show All Current Affairs & GK
General Aptitude
Arithmetic Aptitude
Data Interpretation
Show All General Aptitude
General Knowledge
Basic General Knowledge
General Science
Show All General Knowledge
Medical Science
Anatomy
Biochemical Engineering
Biochemistry
Biotechnology
Microbiology
Show All Medical Science
Technical
Database
Digital Electronics
Electronics
Networking
Show All Technical
Verbal and Reasoning
Logical Reasoning
Verbal Ability
Verbal Reasoning
Show All Verbal and Reasoning
›
If a 3 kg object is moving with a speed of 4 m/s and comes to a stop, what is th
If a 3 kg object is moving with a speed of 4 m/s and comes to a stop, what is the work done by the friction force?
Expand All
Collapse All
Practice Questions
1 question
Q1
If a 3 kg object is moving with a speed of 4 m/s and comes to a stop, what is the work done by the friction force?
-24 J
-48 J
-72 J
-96 J
Show Solution
Copy
Initial kinetic energy = 0.5 × 3 kg × (4 m/s)² = 24 J. Work done by friction = -24 J.
Questions & Step-by-step Solutions
1 item
Q
Q: If a 3 kg object is moving with a speed of 4 m/s and comes to a stop, what is the work done by the friction force?
Solution:
Initial kinetic energy = 0.5 × 3 kg × (4 m/s)² = 24 J. Work done by friction = -24 J.
Steps: 9
Show Steps
Step 1: Identify the mass of the object, which is 3 kg.
Step 2: Identify the speed of the object, which is 4 m/s.
Step 3: Use the formula for kinetic energy: KE = 0.5 × mass × speed².
Step 4: Plug in the values: KE = 0.5 × 3 kg × (4 m/s)².
Step 5: Calculate (4 m/s)², which is 16 m²/s².
Step 6: Multiply 0.5 × 3 kg × 16 m²/s² to get 24 J.
Step 7: The initial kinetic energy of the object is 24 J.
Step 8: When the object comes to a stop, all of this energy is used to overcome friction.
Step 9: The work done by the friction force is equal to the negative of the initial kinetic energy, which is -24 J.
Related Questions
W
What is the wavelength of a photon with a frequency of 6 x 10^14 Hz?
Question: What is the wavelength of a photon with a frequency of 6 x 10^14 Hz?Options: 5 x 10^-7 m3 ..
F
Find the value of tan(45°).
Question: Find the value of tan(45°).Options: 01undefined√3Correct Answer: 1Solution: tan(45°) = 1...
W
What is the derivative of f(x) = x^3 - 3x^2 + 4x - 5?
Question: What is the derivative of f(x) = x^3 - 3x^2 + 4x - 5?Options: 3x^2 - 6x + 43x^2 - 6x2x^2 -..
W
What is the value of 5C2?
Question: What is the value of 5C2?Options: 1020155Correct Answer: 10Solution: 5C2 = 5! / (2!(5-2)!)..
A
A 2 kg ball is thrown vertically upwards with a speed of 10 m/s. What is the max
Question: A 2 kg ball is thrown vertically upwards with a speed of 10 m/s. What is the maximum heigh..
‹
Biology (School & UG)
Chemistry (School & UG)
Civil Engineering
Commerce & Accountancy
Computer Science & IT
Current Affairs & GK
Data Structures & Algorithms
Electrical & Electronics Engineering
English (School)
General Aptitude
General Knowledge
General Knowledge & Current Affairs
Languages & Literature
Law & Legal Studies
Major Competitive Exams
Mathematics (School)
Mechanical Engineering
Medical Science
Physics (School & Undergraduate)
Quantitative Aptitude & Reasoning
Social Science (School)
Technical
Verbal and Reasoning
Vocational & Skill Development
›
Soulshift Feedback
×
On a scale of 0–10, how likely are you to recommend
The Soulshift Academy
?
0
1
2
3
4
5
6
7
8
9
10
Not likely
Very likely
✕
↑
