ENME392 Spring 2015
Written homework 4
Due in class Thursday 4/30 as hardcopy
1.
As the number of farms has decreased in the United States, the average size of the remaining farms
has grown larger, as shown in the table below.
Year
1959
1969
1978
1987
199

ENME392 Spring 2015
Written homework 1
Due in class Tuesday 2/17 as hardcopy
1. A type of radio transmits data across the Atlantic Ocean. The number of errors in the
transmission during any given amount of time approximately follows a Poisson distribution

ENME392 Spring 2015
Written homework 5
Due in class Thursday 5/7 as hardcopy
1.
You run a 23 factorial experiment with n = 6 replicates, and get the data in the table. Note that
the tables give the average and sample standard deviation at each test condit

ENME392 Spring 2015
Written homework 3
Due in class Thursday 4/2 as hardcopy
1.
A factory in Louisville, Kentucky, produces baseball bats. The diameter of the bat should be 10
cm. Out of 500 samples, the sample mean is 10.1, cm with a sample standard devi

ENME392 Spring 2015
Written homework 2
Due in class Tuesday 2/24 as hardcopy
1. The time between arrivals of large comets on Earth is exponentially distributed with a mean
of one year.
(a) What is the shortest period of time during which you have at least

Spring 2015
Due at 9:30 A.M., April 14, 2015
ENME361: Assignment No. 6
1. The dynamic amplification or attenuation of a single degree-of-freedom system is defined as
the ratio of the steady-state magnitude of the displacement response to its static displa

Spring 2015
Due at 9:30 A.M., March 3, 2015
ENME361: Assignment No. 4
2. Obtain the equation of motion for the system with rotating unbalance (shown below) by using
Lagranges equations.
(continued on next page)
1
3. Determine the natural frequency of the

Solutions to Exercises
HW 4
1. a) Compute circumference of wheel:
Remember to convert radius of wheel to meters.
C = 2 r = 1/5m
Next determine the number of revolutions associated with the distance wound.
Revs = 2/(1/5) = 10 revs
Remember 2 radians per re

Spring 2015
Due at 9:30 A.M., February 12, 2015
ENME361: Assignment No. 2
2.3 Consider the crank-mechanism system shown in Figure E2.3. Determine the rotary inertia of this
system about the point O and express it as a function of the angular displacement