It takes 87 j of work to stretch an ideal spring, initially 1.4 m from equilibrium, to a position 2.9 m from equilibrium. what is the value of the spring constant (force constant) of this spring?

Given:

Work done = 87 Joule

= 1.4 m

= 2.9 m

To find:

Spring constant = ?

Formula used:

W =

Solution:

Work done required to stretch a spring from 1.4 m to 2.9 m is 87 Joule. Work done is given by following formula.

W =

where W = work done

k = spring constant or force constant

is change in length i. e

k =

k=

k = 77.33 N/m

Thus, spring constant of the given spring is 77.33 N/m.

hi there!

out of the two, (b) precision would be more reasonable.   however, both a and b could be pretty reasonable.

-awesomerepublic   : )