Chapter 10 - NCPN

5 Write the equation in the form y – k = Asin B(x – h) to find the
equation that fits the Intellectual sine curve. see margin
6 Repeat Steps 2 through 5 for the Emotional and Physical
sine curves. see margin
Activity 4: Swing of a Pendulum
Problem Statement
Use a string and a washer to create a
pendulum and measure the period and
amplitude of the pendulum. Model the
motion of the pendulum with a periodic
function and graph the function. Experiment
with factors such as the length of the string
and the weight of the pendulum to see how
each affects the swing of the pendulum.
Equipment
Graphing
calculator
Protractor
Scissors
Stopwatch
String
Washers or
other weights
Procedure
1 Tie one end of a string to a weight such as a washer or a nut.
Cut the string to a length between 8 and 20 inches.
sample string length: 15 in.
2 Attach the other end of the string to a fixed point such as
a coat hanger hook. You could also tie the end to a pencil
and hold the pencil level against a wall to form a swinging
pendulum.
494 Chapter 10 Trigonometric Functions and Identities