A strong spring is stretched 10 cm by a suspended block. If the block's weight is doubled, the spring will stretch to
A) 15 cm.
B) 20 cm.
C) 40 cm.
D) its elastic limit.
Question 2
A spring is stretched 10 cm by a suspended 1-kg block. If two such springs side-by-side are used to suspend the 1-kg block, each spring will then stretch
A) 5 cm.
B) 10 cm.
C) 20 cm.
D) 30 cm.
E) none of the above