# 3D Equilibrium And Friction

3D Equilibrium And Friction

**MET211 Quiz 4**

*Time *: 30 minutes *Full mark *: 100 points

Problem 1.

Determine the magnitude and location of the resultant of the force systems shown

Solution:

Problem 2.

A horizontal force of 100 N is required to start a 40-kg block sliding along a horizontal sur- face. What is the coefficient of static friction?

Solution:

Problem 3.

Determine the mass of a block if a force of 25 N is required to start it sliding on a horizontal surface (μ = 0.33).

Solution

Problem 4.

Determine the mass *m* that can be lifted by a rope with three-quarters of a turn around a fixed horizontal shaft (μ = 0.3) if a force of 15 kN is applied to its other end.