Question

A ball is pushed into a spring-loaded launcher with a force of 20 N, which compresses the spring 0.08 m.

Answer 1

Answer:

0.8J

Explanation:

Given parameters:

Force  = 20N

Compression  = 0.08m

Unknown:

Spring constant  = ?

Elastic potential energy  = ?

Solution:

To solve this problem, we use the expression below:

           F = k e

F is the force

k is the spring constant

e is the compression

             20  = k x 0.08

              k  = 250N/m

Elastic potential energy;

       EPE  = $\frac{1}{2}$ k e²    =  $\frac{1}{2}$  x 250 x 0.08²

 Elastic potential energy = 0.8J