Question

Diego is trying to lift a piano to the second floor of his house. Diego uses a pulley system and gives a big lift to the piano.The piano moves upward, then stops, and then it starts to fall to the ground. Which list best describes the forces on the piano in the proper order?

Answer 1

A. Positive force → Balanced force → Negative force.

Explanation: took the test

Answer 2

Positive force → Balanced force → Negative force.

Step-by-step explanation:

When Diego gives a big lift to the piano with the help of the pulley system at that time, initially piano moves upward. In this case, a positive force was acting on it.

After that, when piano stops, in this condition, a balanced force was acting on it.

After some time, the piano starts falling. Here, the negative force was acting on the piano.

So, from here, we can say that the forces were a positive force, then a balanced force, and in the end, it was a negative force.