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
›
A car of mass 1000 kg accelerates from rest to a speed of 20 m/s. What is the wo
A car of mass 1000 kg accelerates from rest to a speed of 20 m/s. What is the work done on the car?
Expand All
Collapse All
Practice Questions
1 question
Q1
A car of mass 1000 kg accelerates from rest to a speed of 20 m/s. What is the work done on the car?
20000 J
40000 J
80000 J
100000 J
Show Solution
Copy
Kinetic energy = 0.5 × m × v^2 = 0.5 × 1000 kg × (20 m/s)^2 = 200000 J.
Questions & Step-by-step Solutions
1 item
Q
Q: A car of mass 1000 kg accelerates from rest to a speed of 20 m/s. What is the work done on the car?
Solution:
Kinetic energy = 0.5 × m × v^2 = 0.5 × 1000 kg × (20 m/s)^2 = 200000 J.
Steps: 9
Show Steps
Step 1: Identify the mass of the car, which is 1000 kg.
Step 2: Identify the final speed of the car, which is 20 m/s.
Step 3: Use the formula for kinetic energy, which is KE = 0.5 × m × v^2.
Step 4: Substitute the mass (1000 kg) into the formula.
Step 5: Substitute the speed (20 m/s) into the formula.
Step 6: Calculate (20 m/s)^2, which is 400 m^2/s^2.
Step 7: Multiply 0.5 by 1000 kg, which gives 500 kg.
Step 8: Multiply 500 kg by 400 m^2/s^2, which gives 200000 J.
Step 9: Conclude that the work done on the car is 200000 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 ..
A
A 10 kg object is moving with a speed of 3 m/s. If it comes to a stop, how much
Question: A 10 kg object is moving with a speed of 3 m/s. If it comes to a stop, how much work is do..
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 -..
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 value of 5C2?
Question: What is the value of 5C2?Options: 1020155Correct Answer: 10Solution: 5C2 = 5! / (2!(5-2)!)..
‹
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
✕
↑
