Question

a mass attached to a string that is itself attached to the ceiling swings back and forth. a.) at the bottom of the arc, it has no net force acting on it. b.) at the bottom of the arc, it has no net force acting in the vertical. c.) at the bottom of the arc, tension and gravity balance one another out. d.) at the bottom of the arc, there is no centrifugal force.

Answer 1

At the bottom of the arc, the tension in the string balances the force of gravity, providing the necessary centripetal force to keep the mass moving in a circular path. Therefore, the correct option is C

Step-by-step explanation:

At the bottom of the arc, the mass attached to a string experiences a net force that is equal to the tension in the string. This is because the tension in the string provides the centripetal force necessary to keep the mass moving in a circular path.

The tension in the string is responsible for balancing the force of gravity. As the mass swings towards the bottom of the arc, the tension in the string increases to counteract the gravitational force pulling the mass downwards.

Therefore, at the bottom of the arc, there is a balance between the tension in the string and the force of gravity.