Ask Question
23 May, 16:36

Jonah is trying to move his 22-kg desk by pushing on it with a force of 130 N, but his brother is leaning on it with a downward force of 24 N, just preventing it from moving. What is the coefficient of static friction between the desk and the floor?

+1
Answers (1)
  1. 23 May, 19:41
    0
    0.54

    Explanation:

    Draw a free body diagram. There are 5 forces on the desk:

    Weight force mg pulling down

    Applied force 24 N pushing down

    Normal force Fn pushing up

    Applied force 130 N pushing right

    Friction force Fnμ pushing left

    Sum of the forces in the y direction:

    ∑F = ma

    Fn - mg - 24 = 0

    Fn = mg + 24

    Fn = (22) (9.8) + 24

    Fn = 240

    Sum of the forces in the x direction:

    ∑F = ma

    130 - Fnμ = 0

    Fnμ = 130

    μ = 130 / Fn

    μ = 130 / 240

    μ = 0.54
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “Jonah is trying to move his 22-kg desk by pushing on it with a force of 130 N, but his brother is leaning on it with a downward force of 24 ...” in 📘 Physics if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers