NEET Exam  >  NEET Questions  >  A string has an unstretched length of 20cm. A... Start Learning for Free
A string has an unstretched length of 20cm. A 6N weight stretched it to 32cm. If 6N weight is replaced by 5N weight, its new stretched length is?
Most Upvoted Answer
A string has an unstretched length of 20cm. A 6N weight stretched it t...
Problem:
A string has an unstretched length of 20cm. A 6N weight stretched it to 32cm. If 6N weight is replaced by 5N weight, its new stretched length is?

Solution:

To solve this problem, we need to use Hooke's law, which states that the force required to stretch a spring or a string is proportional to the extension of the spring or string.

Mathematically, we can write Hooke's law as:

F = kx

Where F is the force applied, x is the extension of the spring or string, and k is the spring constant.

In this problem, we are given that:

- The unstretched length of the string is 20cm.
- A 6N weight stretched the string to 32cm.

Therefore, we can calculate the spring constant as follows:

k = F/x
k = 6N/(32cm - 20cm)
k = 6N/12cm
k = 0.5 N/cm

Now, we need to find the new stretched length of the string when a 5N weight is applied. We can use Hooke's law again to solve this problem.

We know that the spring constant is the same for the string, so we can write:

F = kx

Where F is the force applied, x is the extension of the string, and k is the spring constant.

We are given that the force applied is 5N, so we can write:

5N = 0.5 N/cm * x

Solving for x, we get:

x = 10cm

Therefore, the new stretched length of the string when a 5N weight is applied is 20cm + 10cm = 30cm.

Answer:
The new stretched length of the string when a 5N weight is applied is 30cm.
Community Answer
A string has an unstretched length of 20cm. A 6N weight stretched it t...
L of string=20cm
change in L when 6N is applied =32-20= 12cm
change due to 1N= 12/6= 2cm
L when 5 N weight is applied =30 cm
Attention NEET Students!
To make sure you are not studying endlessly, EduRev has designed NEET study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in NEET.
Explore Courses for NEET exam

Top Courses for NEET

A string has an unstretched length of 20cm. A 6N weight stretched it to 32cm. If 6N weight is replaced by 5N weight, its new stretched length is?
Question Description
A string has an unstretched length of 20cm. A 6N weight stretched it to 32cm. If 6N weight is replaced by 5N weight, its new stretched length is? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about A string has an unstretched length of 20cm. A 6N weight stretched it to 32cm. If 6N weight is replaced by 5N weight, its new stretched length is? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A string has an unstretched length of 20cm. A 6N weight stretched it to 32cm. If 6N weight is replaced by 5N weight, its new stretched length is?.
Solutions for A string has an unstretched length of 20cm. A 6N weight stretched it to 32cm. If 6N weight is replaced by 5N weight, its new stretched length is? in English & in Hindi are available as part of our courses for NEET. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free.
Here you can find the meaning of A string has an unstretched length of 20cm. A 6N weight stretched it to 32cm. If 6N weight is replaced by 5N weight, its new stretched length is? defined & explained in the simplest way possible. Besides giving the explanation of A string has an unstretched length of 20cm. A 6N weight stretched it to 32cm. If 6N weight is replaced by 5N weight, its new stretched length is?, a detailed solution for A string has an unstretched length of 20cm. A 6N weight stretched it to 32cm. If 6N weight is replaced by 5N weight, its new stretched length is? has been provided alongside types of A string has an unstretched length of 20cm. A 6N weight stretched it to 32cm. If 6N weight is replaced by 5N weight, its new stretched length is? theory, EduRev gives you an ample number of questions to practice A string has an unstretched length of 20cm. A 6N weight stretched it to 32cm. If 6N weight is replaced by 5N weight, its new stretched length is? tests, examples and also practice NEET tests.
Explore Courses for NEET exam

Top Courses for NEET

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev