Author Question: A 200-kg box is placed on a ramp. As one end of the ramp is raised, the box begins to move downward ... (Read 70 times)

Arii_bell · **on:** Jul 28, 2018

A 200-kg box is placed on a ramp. As one end of the ramp is raised, the box begins to move downward just as the angle of inclination reaches 18.0. What is the coefficient of static friction between box and ramp?
a. 0.42
b. 0.32
c. 3.1
d. 0.27
e. 62

Question 2

A horizontal force of 850 N is needed to overcome the force of static friction between a level floor and a 350-kg crate. If g = 9.8 m/s2, what is the coefficient of static friction?
a. 24.8
b. 2.48
c. 4.04
d. 0.248
e. 2.43