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Question 3 (1 point)
You are helping your aunt move a piano on wheels from one room to another. When you push the piano horizontally, it moves at constant speed. What can you say about the piano

Respuesta :

skyluke89

The force of friction is equal to the pushing force, and the acceleration is zero

Explanation:

In this problem, we are pushing a piano along the floor, in the horizontal direction.

There are 2 forces acting in the horizontal direction on the piano:

  • The applied force, [tex]F_a[/tex], acting forward
  • The force of friction, [tex]F_f[/tex], acting backward

Therefore, the net force in the horizontal direction is

[tex]\sum F = F_a - F_f[/tex]

According to Newton's second law, the net force is equal to the product between the piano's mass (m) and its acceleration:

[tex]\sum F = ma[/tex]

Combining the two equations,

[tex]F_a - F_f = ma[/tex]

However, we are also told that the piano moves at constant speed, therefore the acceleration is zero:

[tex]a=0[/tex]

And so,

[tex]F_a - F_f = 0\\F_f = F_a[/tex]

which means that the force of friction is equal to the applied force.

Learn more about Newton's second law:

brainly.com/question/3820012

#LearnwithBrainly

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