7. K/U Explain how each of the following behave like a spring. (a) a pole used in pole-vaulting (b) the strings in a tennis racquet (c) the string on a bow 8. O Prove that the expression for elastic potential energy has units equivalent to the joule.
7. K/U Explain how each of the following behave like a spring. (a) a pole used in pole-vaulting (b) the strings in a tennis racquet (c) the string on a bow 8. O Prove that the expression for elastic potential energy has units equivalent to the joule.
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Please answer questions 7&8
Transcribed Image Text:7. K/U Explain how each of the following
behave like a spring.
(a) a pole used in pole-vaulting
(b) the strings in a tennis racquet
(c) the string on a bow
8. O Prove that the expression for elastic
potential energy has units equivalent to
the joule.
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