EGR 320 WEEK 2 HOMEWORK PROBLEMS

Chapter 4 pages 137 – 142

4.13   Problem Statement: A 160kg crate hangs from ropes as shown. Find the tension in ropes AB and AC.

4.14:

Problem Statement: A 250lbm box is held in place by a cord with a spring scale on an inclined plane as shown. If all surfaces are smooth, what is the force reading on the scale.

4.20:

Problem Statement: A 30-cm-long cylindrical rod of red brass (E = 120 GPa) is loaded axially causing the rod to elongate 0.5880 mm. If the diameter of the rod is 1.75 cm, what is the load?

4.22

Problem Statement: A solid composite shaft is subjected to a 2-MN force as shown. Section AB is red brass (E = 120 GPa), and section BC is AISI 1010 steel (E = 200 GPa). Find the normal stress in each section and the total axial deformation of the shaft.

Chapter 5

5.5 - 

5.16

What resistance gives a total resistance of 252 Ω?

5.23

Problem Statement: A simple DC circuit consists of a 24-V independent voltage source and three resistors as shown. Find (a) the current, (b) the voltage across each resistor, and (c) the power dissipated by each resistor

5.24

Problem Statement: Four resistors are connected in parallel across a 200-mA independent current source as shown. What is the voltage across the resistors and the current in each resistor?

5.26

Problem Statement: A 50-V independent voltage source supplies power to three resistors in the DC circuit shown. For each resistor, find the voltage drop and current.

5.28

Problem Statement: For the DC circuit shown in the figure shown. Find the voltage across each resistor and the current in each resistor. Find the power dissipations in the 20-Ω and 100-Ω resistors.