Practice Problem 1, 2

Practice Problems: Work Done by the Force of a Spring

   1. A spring has a free length of 20 cm with a given spring constant given of 50 N/m.

     Find the work needed to stretch the spring from a length of 22 cm to 25 cm.


    2. A force of 4-lb is required to compress a spring 0.25 inches. The spring has a free length of 1.25 inches.

     Determine the work needed to compress the spring from the free length to a length of 0.85 inches.