A dart of mass m=0.10kg is pressed against the spring of a toy dart gun. The spring inside the
gun (with a spring stiffness constant k=250 N/m and ignorable mass) is compressed 0.060 m and
released. If the dart detaches from the spring when the spring reaches its natural length (x=0 ), what
speed does the dart acquire?

Question

A dart of mass m=0.10kg is pressed against the spring of a toy dart gun. The spring inside the 
gun (with a spring stiffness constant k=250 N/m and ignorable mass) is compressed 0.060 m and 
released. If the dart detaches from the spring when the spring reaches its natural length (x=0 ), what 
speed does the dart acquire?

anonymous · Answer

energy stored in spring = k.E of the object.