***A spring has a natural length of 10 cm. If 10 dynes of force is required to keep it stretched 1/2 cm., how much work is done in stretching it from its natural length to a length of 14 cm? А 150 dynes - ст В 180 dynes - ст 160 dynes - cm

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Chapter2: Vectors
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Problem 21CQ: What is wrong with the following expressions? How can you correct them? (a) C=AB , (b) C=AB , (c)...
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***A spring has a natural length of 10 cm. If 10 dynes of force is required to keep it
stretched 1/2 cm., how much work is done in stretching it from its natural length to a length of 14 cm?
A
150 dynes - ст
B
180 dynes - ст
(c) 160 dynes - ст
140 dynes - ст
none of these
Transcribed Image Text:***A spring has a natural length of 10 cm. If 10 dynes of force is required to keep it stretched 1/2 cm., how much work is done in stretching it from its natural length to a length of 14 cm? A 150 dynes - ст B 180 dynes - ст (c) 160 dynes - ст 140 dynes - ст none of these
dx
* Transforming
using miscellaneous substitution will become
secx +1
A none of these
1- z?
dz
1+z?
B
© S
+ z?
dz
C)
1- z2
D [Z+z
dz
1- z2
2- 2z2
dz
E
1+z?
Transcribed Image Text:dx * Transforming using miscellaneous substitution will become secx +1 A none of these 1- z? dz 1+z? B © S + z? dz C) 1- z2 D [Z+z dz 1- z2 2- 2z2 dz E 1+z?
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