Homework 28 You must show all work to receive credit, Write in a clear and organ

Question

Homework 28 You must show all work to receive credit, Write in a clear and organized manner; unclear work will not teceive credit. 1 Warm-up Questions Betsy is pulling directly horizontally on a rope providing a tension force of 400 N to an 80 kg crate, as shown. Due to friction, the crate is not moving. The coefficient of static friction between the crate and the ground is 0.80, and the coefficient of kinetic friction between the crate and the ground is 0.40. 1. Which of the following is true concerning the magnitude of the static friction force f, and the (mag nitude of the) tension in the rope T? c) Tf. b) T- 2. What is the hardest Besty could pull before the crate would begin to move? Max Force

Explanation / Answer

static frictional force is Fs=u x m x g = 0.8 x 80 x 9.81 = 627.84 Newton

tension is T= 400 N

so we see that the tension is smaller than the frictional force.

Option - C

(2) before the crate would begin to move

T=Fs=627.84 Newton

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