9. A spring has a natural length of 20 cm. A 40 N force is required to stretch the spring to a length of 30 cm. How much work (in Joules) is done in stretching the spring from 35 cm to 38 cm ? [Note: 1 Joule= 1 Newton-meter ] (A) 1.25 (B) 1.98 (C) 3.52 (D) 4.00
9. A spring has a natural length of 20 cm. A 40 N force is required to stretch the spring to a length of 30 cm. How much work (in Joules) is done in stretching the spring from 35 cm to 38 cm ? [Note: 1 Joule= 1 Newton-meter ] (A) 1.25 (B) 1.98 (C) 3.52 (D) 4.00
Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter6: Energy Of A System
Section: Chapter Questions
Problem 17P: When a 4.00-kg object is hung vertically on a certain light spring that obeys Hookes law, the spring...
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![8. If an ideal spring is stretched x units beyond its natural length, then according to Hooke's law the spring
pulls back with a force f(x) equals to
a. X
b. kx
c. k
d. kx²
9. A spring has a natural length of 20 cm. A 40 N force is required to stretch the spring to a
length of 30 cm. How much work (in Joules) is done in stretching the spring from 35 cm to 38
cm ?
[Note: 1 Joule= 1 Newton-meter ]
(A) 1.25
(B) 1.98
(C) 3.52
(D) 4.00
10. A tank full of water is in the shape of a box 3m deep, 4m long and 3m wide. What is the differential
volume?
a. 6dy
b. 12dy
c. 12 π dy
d.
2.25dy](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ffaf16d1d-fc6e-4ec4-b1f4-f08973193719%2Fbb811224-4a9c-4182-8bc7-8917f9cdb4b4%2F6spx6n_processed.jpeg&w=3840&q=75)
Transcribed Image Text:8. If an ideal spring is stretched x units beyond its natural length, then according to Hooke's law the spring
pulls back with a force f(x) equals to
a. X
b. kx
c. k
d. kx²
9. A spring has a natural length of 20 cm. A 40 N force is required to stretch the spring to a
length of 30 cm. How much work (in Joules) is done in stretching the spring from 35 cm to 38
cm ?
[Note: 1 Joule= 1 Newton-meter ]
(A) 1.25
(B) 1.98
(C) 3.52
(D) 4.00
10. A tank full of water is in the shape of a box 3m deep, 4m long and 3m wide. What is the differential
volume?
a. 6dy
b. 12dy
c. 12 π dy
d.
2.25dy
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