Adart is loaded into a spring-loaded toy dart gun by pushing the spring in by a 
distance d. for the next loading? the spring is compressed a distance d/3. how much 
work is required to load the second dart compared to that required to load the first? a) nine times as muchb) three times as muchc) the samed) one-third as muche) one-ninth as much

Explanation:

The potential energy of the spring or the work done by the spring is given by :

............(1)

k is the spring constant

d is the compression

When the spring is compressed a distance d' = d/3, let W' is the work is required to load the second dart. Then the work done is given by :

.............(2)

Dividing equation (1) and (2) :

So, the work required  to load the second dart compared to that required to load the first is one-Ninth as much. Therefore, the correct option is (E).

that would be because of both gravity and friction. so     c