Potential energy is highest at the top of the loop, and kinetic energy is highest at the bottom of the loop.
It would be 12hz because it
Answer:
Part a)

Part b)

Explanation:
Part a)
For force conditions of two blocks we will have


now from above equations we have


now we know that


now from above equation we have


Part b)
When heavier block is removed and F = 908 N is applied at the end of the string then we have



The vector sum of forces acting on a non-accelerating object equals zero.
equation form: ΣF = 0