Question

third law
which of the following is true about the force acting on the cup and causing it to spin?
a. it is equal in magnitude and in the same direction as the force pushing the water out of the straws.
b. it is smaller in magnitude and in the same direction as the force pushing the water out of the straws.
c. it is equal in magnitude but opposite in direction to the force pushing the water out of the straws.
d. it is smaller in magnitude but opposite in direction to the force pushing the water out of the straws.

Explanation:

Step1: Recall Newton's third - law

Newton's third - law states that for every action, there is an equal and opposite reaction.

Step2: Analyze the forces in the problem

The force pushing the water out of the straws is the action force. The force causing the cup to spin is the reaction force. According to Newton's third - law, these two forces are equal in magnitude and opposite in direction.

Answer:

C. It is equal in magnitude but opposite in direction to the force pushing the water out of the straws.