Question 6
A 150-kg crate is placed on an adjustable inclined plane. As one
end of the incline is raised, the crate begins to move downward. If
the crate slides down the plane with an acceleration of 0.20 m/s
2 when the incline angle is 18 °, what is the
coefficient of kinetic friction between ramp and crate? (
g = 9.8 m/s 2)
A) 0.50
B) 0.40
C)0.30
D) 2.8
E) 0.20
Question 7
Two ropes are attached to a 50-kg object. The first rope applies
a force of 35 N and the second, 55 N. If the two ropes are
perpendicular to each other, what is the resultant acceleration of
the object?
A) 65 m/s2
B) 0.77 m/s2
C) 1.3 m/s2
D) 35 m/s2
E) 1.8 m/s2