Page 397 - BenchMark_4-2
P. 397
Fun with Inventions
During World War II, for
example, a navy engineer
watched a spring fall from a
v.
to move back and forth and up and down
shelf. Then, it flip-flopped
flip-flopped
across the floor. The jumping
spring inspired him to invent a spring and the Slinky
the Slinky. Check
What inspired a navy engineer to invent the Slinky?
A spring falling from a shelf. / A spring falling from
a shelf inspired a navy engineer to invent the Slinky.
Unit 11 | Fun with Inventions
