Question

A spring requires a force of 25 N to produce an extension of 2 cm in it. What is the work done in further extending it by 3 cm.

Answer 1

force of spring = k x

25=k 2* 10^-2

find k

use that and plug in here

1/2 k x^2

Answer 2

work done by spring= 1/2 k x^2

Answer 3

would that make k 1250?

Answer 4

yes k=1250

Answer 5

my answer choices are
(A) 1.3125 J
(B) 1.876 J
(C) 2.7121 J
(D) 2.85 J

Answer 6

1.3125J

Answer 7

\[1250 \int_{.02}^{.05} x \, dx\]

Answer 8

=1.3125

Answer 9

you people are the best! thanks