Author Question: A weightless spring is stretched 10 cm by a suspended 1-kg block. If two such springs are used to ... (Read 139 times)

lilldybug07 · **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.