Answer:
Kinetic energy of the arrow is 50 J
Step-by-step explanation:
Here we know that archer stretches the the bow and stores potential energy into the thread
Now when he releases the thread then potential energy of the thread will convert into the kinetic energy of the arrow
This verify the conservation of energy according to which energy neither be created nor be destroyed but it will convert from one form to another form
So here we have
KE = 50 J