Class 9 Exam > Class 9 Questions > Find the initial velocity of a car which is s...
Start Learning for Free
Find the initial velocity of a car which is stopped in 10 seconds by applying brakes . the retardation due to brakes is 2.5m/s2
Verified Answer
Find the initial velocity of a car which is stopped in 10 seconds by a...
To find: Initial velocityGiven: Final velocity=0Time=10 secAcceleration= -2.5 m/s^2 (Negative sign as it is retardation)Using:a=v-u/t-2.5=0-u/10-2.5=-u/10-2.5*10=-u-25=-u25=u Therefore, Initial velocity is 25 m/s.
This question is part of UPSC exam. View all Class 9 courses
Most Upvoted Answer
Find the initial velocity of a car which is stopped in 10 seconds by a...
Given data:
- Time taken to stop the car, t = 10 seconds
- Retardation due to brakes, a = 2.5 m/s^2
Explanation:
The initial velocity of the car can be calculated using the equation of motion:
v = u + at
Where:
- v is the final velocity (which is 0 since the car comes to a stop)
- u is the initial velocity (what we need to find)
- a is the retardation due to brakes
- t is the time taken to stop the car
Step 1: Rearrange the equation to solve for u:
0 = u + a * t
Step 2: Substitute the given values into the equation:
0 = u + 2.5 * 10
Simplifying the equation:
0 = u + 25
To isolate u, we subtract 25 from both sides of the equation:
-25 = u
Therefore, the initial velocity of the car is -25 m/s.
Explanation:
The negative sign indicates that the car was moving in the opposite direction of the applied brakes. It suggests that the car was initially moving in the negative direction and it took 10 seconds for the brakes to reduce its velocity to zero.
It is important to note that the equation used assumes constant retardation throughout the braking process. In real-life scenarios, the retardation may vary due to several factors, such as road conditions and the efficiency of the braking system.
- Time taken to stop the car, t = 10 seconds
- Retardation due to brakes, a = 2.5 m/s^2
Explanation:
The initial velocity of the car can be calculated using the equation of motion:
v = u + at
Where:
- v is the final velocity (which is 0 since the car comes to a stop)
- u is the initial velocity (what we need to find)
- a is the retardation due to brakes
- t is the time taken to stop the car
Step 1: Rearrange the equation to solve for u:
0 = u + a * t
Step 2: Substitute the given values into the equation:
0 = u + 2.5 * 10
Simplifying the equation:
0 = u + 25
To isolate u, we subtract 25 from both sides of the equation:
-25 = u
Therefore, the initial velocity of the car is -25 m/s.
Explanation:
The negative sign indicates that the car was moving in the opposite direction of the applied brakes. It suggests that the car was initially moving in the negative direction and it took 10 seconds for the brakes to reduce its velocity to zero.
It is important to note that the equation used assumes constant retardation throughout the braking process. In real-life scenarios, the retardation may vary due to several factors, such as road conditions and the efficiency of the braking system.
Attention Class 9 Students!
To make sure you are not studying endlessly, EduRev has designed Class 9 study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Class 9.
|
|
Explore Courses for Class 9 exam
|
|
Similar Class 9 Doubts
Top Courses for Class 9View all
Find the initial velocity of a car which is stopped in 10 seconds by applying brakes . the retardation due to brakes is 2.5m/s2
Question Description
Find the initial velocity of a car which is stopped in 10 seconds by applying brakes . the retardation due to brakes is 2.5m/s2 for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Find the initial velocity of a car which is stopped in 10 seconds by applying brakes . the retardation due to brakes is 2.5m/s2 covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Find the initial velocity of a car which is stopped in 10 seconds by applying brakes . the retardation due to brakes is 2.5m/s2.
Find the initial velocity of a car which is stopped in 10 seconds by applying brakes . the retardation due to brakes is 2.5m/s2 for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Find the initial velocity of a car which is stopped in 10 seconds by applying brakes . the retardation due to brakes is 2.5m/s2 covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Find the initial velocity of a car which is stopped in 10 seconds by applying brakes . the retardation due to brakes is 2.5m/s2.
Solutions for Find the initial velocity of a car which is stopped in 10 seconds by applying brakes . the retardation due to brakes is 2.5m/s2 in English & in Hindi are available as part of our courses for Class 9.
Download more important topics, notes, lectures and mock test series for Class 9 Exam by signing up for free.
Here you can find the meaning of Find the initial velocity of a car which is stopped in 10 seconds by applying brakes . the retardation due to brakes is 2.5m/s2 defined & explained in the simplest way possible. Besides giving the explanation of
Find the initial velocity of a car which is stopped in 10 seconds by applying brakes . the retardation due to brakes is 2.5m/s2, a detailed solution for Find the initial velocity of a car which is stopped in 10 seconds by applying brakes . the retardation due to brakes is 2.5m/s2 has been provided alongside types of Find the initial velocity of a car which is stopped in 10 seconds by applying brakes . the retardation due to brakes is 2.5m/s2 theory, EduRev gives you an
ample number of questions to practice Find the initial velocity of a car which is stopped in 10 seconds by applying brakes . the retardation due to brakes is 2.5m/s2 tests, examples and also practice Class 9 tests.
|
|
Explore Courses for Class 9 exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup