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Author Question: A weightless spring is stretched 10 cm by a suspended 1-kg block. If two such springs are used to ... (Read 179 times)

lilldybug07

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on: Jul 29, 2018
A weightless spring is stretched 10 cm by a suspended 1-kg block. If two such springs are used to suspend the block, one spring above the other, to effectively provide one double-length spring, then the total stretch of the double-length spring will be
 
  A) 5 cm.
  B) 10 cm.
  C) 20 cm.
  D) 30 cm.
  E) none of the above

Question 2

An un-stretched hanging spring is 50 cm long. Suspending a 100-N block from it increases its length to 60 cm. Adding another 100-N block makes the spring's length
 
  A) 60 cm.
  B) 70 cm.
  C) 80 cm.
  D) 100 cm.
  E) 120 cm.


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tuwy

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Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: C

Answer to Question 2

Answer: B


lilldybug07

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Reply 2 on: Jul 29, 2018
:D TYSM

nguyenhoanhat

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Reply 3 on: Yesterday
Gracias!

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