Question
Suppose that 4 Joules of work is needed to stretch a spring from its natural length of 11 cm to a length of 36 cm.
a) How much work is needed to stretch the spring from 18 cm to 30 cm?
W = " f(x)dx , where f(x):
%3D
and b
W =
J.
b) How far (in meters) beyond its natural length would a force of 40 N keep the spring stretched?
m.
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Transcribed Image Text

Suppose that 4 Joules of work is needed to stretch a spring from its natural length of 11 cm to a length of 36 cm. a) How much work is needed to stretch the spring from 18 cm to 30 cm? W = " f(x)dx , where f(x): %3D and b W = J. b) How far (in meters) beyond its natural length would a force of 40 N keep the spring stretched? m.

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