Question

A stagehand starts sliding a large piece of stage scenery originally at rest by pulling it horizontally with a force of 176 N. What is the coefficient of static friction between the stage floor and the 490 N piece of scenery? a. 0.36 c. 2.8 b. -2.8 d. -0.36

Answer 1

Answer:

Option (a)

Explanation :

A stage hand starts sliding a large piece of stage scenery originally at rest by pulling it horizontally with a force of 176 N.

Hence Force applied  $\text { Fapplied }=176 \mathrm{N}$

Force on piece of scenery $\mathrm{F}_{\mathrm{g}}=490 \mathrm{N}$

$\Sigma \mathrm{F} \mathrm{y}=\mathrm{F} \mathrm{n}-\mathrm{Fg}=0$

$\mathrm{Fn}=\mathrm{Fg}$

$\mathrm{FS}_{\mathrm{max}}=\mathrm{F}_{\mathrm{applied}}$

µk = $\frac{\mathrm{Fs} \max }{\mathrm{Fn}}$

=  $\frac{\text { Fapplied }}{\mathrm{Fg}}$

=$\frac{176}{490}$ =0.36

coefficient of static friction is 0.36