1.
Test Your Understanding:
1. Consider two pendulums. Pendulum 1 has a string of shorter length than Pendulum 2 and
Pendulum 2 has a object mass greater than Pendulum 1. Which of the following is true?
a.) Pendulum 1 has a greater period than Pendulum 2 because it has a smaller mass.
b.) Pendulum 2 has a greater period than pendulum 1 because its string has a longer length.
c.) The period of the two pendulums cannot be compared without more information.
d.) The two pendulums have the same period.
2. A pendulum has a mass m and a string length of L. What will happen to its total energy if L is
doubled?
a) Increase by a factor of 2
b) Decrease by a factor of
1
2
c) Increase by a factor of √2
d) Decrease by a factor of √
1
2
e) No change.
3) A pendulum has a mass m and a string length of L. What will happen to its total energy if m is
halved?
a) Increase by a factor of 2
b) Decrease by a factor of
1
2
c) Increase by a factor of √2
d) Decrease by a factor of √
1
2
e) No change.

2.
Answers:
1.b
2.a
3.d