Homework Assignment 5:
Due beginning of class
Name:
Show all work for complete credit.
• Unless specified otherwise, round your answers to a reasonable number of
significant figures. (Rules are given in chapter 1 or round to 2-3 figures.)
• Give very large or very small values in scientific notation.
You will need to reference the following documents:
• Homework Guide: Energy
#1a. Chapter 5: Problem #38 (Underline or highlight the question.)
In a circus performance, a monkey is strapped to a sled and both are given an initial speed of 4.0 m/s up a
20° inclined track. The combined mass of monkey and sled is 20 kg, and the coefficient of kinetic friction
between sled and incline is 0.20. How far up the incline do the monkey and sled move?
Plan: Do the problem as you would have from chapters 2 and 4. Start with a Motion
Diagram and a Free-Body Diagram. Write all the equations and solve.
Show your work:
Answer the question: Be sure to include units.
Evaluate:
Do a unit analysis (if you didn’t do one above).
Is the magnitude of the answer reasonable? Give a reason.
Phy 101: HW5: Fall 07
Eyres
Homework Assignment 5:
Due beginning of class
Name:
#2. Chapter 5: Problem #38 (Underline or highlight the question.)
In a circus performance, a monkey is strapped to a sled and both are given an initial speed of 4.0 m/s up a
20° inclined track. The combined mass of monkey and sled is 20 kg, and the coefficient of kinetic friction
between sled and incline is 0.20. How far up the incline do the monkey and sled move?
Plan: Do the problem by using work and energy concepts. Begin with an Energy-Bar
chart and then write the equations and solve..
Show your work:
Answer the question: Be sure to include units.
Evaluate:
Do a unit analysis (if you didn’t do one above).
Is the magnitude of the answer reasonable? Is it the same as you calculated following
the other plan?.
Phy 101: HW5: Fall 07
Eyres
Homework Assignment 5:
Due beginning of class
Name:
#3. Chapter 5: Problem #52 (Underline or highlight the question.)
A block of mass 12.0 kg slides from rest down a frictionless 35.0° incline and is stopped by a strong
spring with k = 3.00 × 104 N/m. The block slides 3.00 m from the point of release to the point where it
comes to rest against the spring. When the block comes to rest, how far has the spring been compressed?
Plan:
Show your work:
Answer the question: Be sure to include units.
Evaluate:
Do a unit analysis (if you didn’t do one above).
Is the magnitude of the answer reasonable? Give a reason.
Phy 101: HW5: Fall 07
Eyres