How much pressure is applied to a table top if 800N are spread over 2.4m2?

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.T

Mila [183]

Answer:

Correct Answer is positive force → balanced force → negative force

Explanation:

When Diego gives a big lift to the piano with the help of pulley system that time, initially piano moves upward so positive force acts on it.

Later, Piano stops, in this condition balanced force act on it since force applied by Diego is balanced by gravitational force of earth.

After some time piano starts falling in this condition negative force will act on the piano. In this condition, gravitational force will acts on piano in downward direction.

3 0

4 years ago

Read 2 more answers

Need answer ASAP! I can't spot the position of the car

DochEvi [55]

To find velocity on a distance vs time graph, find the slope (of line segment C in this case)

Calculate slope by finding rise (change in x) over run (change in x).

10-30/160-80
-20/80
-1/4

Final answer: B

8 0

4 years ago

Nikolas had an idea that he could use the compressed carbon dioxide in a fire extinguisher to propel him on his skateboard.

Vikentia [17]

The Newton’s law Nikolas would use to come up with this idea is the Third law that states:

When one body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction on the first body.

So, in this case, let's name the first Body A which is the skateboard and the second body B which is the compressed carbon dioxide in a fire extinguisher. Then, as shown in the figure below, according to the Third law:

 $FA = -FB$