You do 30J of work to load a toy dart gun. However, the dart is 10cm long and feels a frictional force of 10N while going through the dart gun's barrel. What is the kinetic energy of that fired dart?
A. 30J
B. 29J
C. 28J
D. 27J
A. 30J
B. 29J
C. 28J
D. 27J