Question

part b
what happens when block b moves downward?
view available hint(s)
the cords tension on the left and right sides are equal.
the cords tension on the left side of the pulley is higher than on the right side.
the cords tension on the right side of the pulley is higher than on the left side.

Explanation:

In a simple pulley - block system, when one block moves, if the pulley is ideal (mass - less and friction - less), the tension in the cord is the same throughout the cord. This is because the cord is inextensible and the pulley does not introduce any additional forces to change the tension on different parts of the cord.

Answer:

The cord's tension on the left and right sides are equal.