Pendulum Clock Gizmo : ExploreLearning
ASSESSMENT QUESTIONS:
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Period 8
Questions & Answers
1. The clock shown below is running too slow. If a clock maker was called to fix it, what couldshe do to
make it run faster?
A. She could increase the starting angle of the swing.
B. She could increase the mass of the bob.
C. She could shorten the length of the pendulum.
D. She could increase the length of the pendulum.
Correct Answer: C. She could shorten the length of the pendulum.
Explanation: If a pendulum clock is running too slow, the period of its pendulum must be
1/4
, Pendulum Clock Gizmo : ExploreLearning
too long. The period is mostly determined by the length of the pendulum. The periodincreases
as the pendulum gets longer, and decreases as it gets shorter. Therefore, making the pendulum
shorter will speed up the clock.
Changing the mass of the bob has no effect on the pendulum period. Increasing thestarting
angle might increase the period slightly, but will not decrease the period.
You answered this question correctly!
2. A clockmaker tested a pendulum with a stopwatch. He clicked the stopwatch each time the pendulum
clock finished a full swing and returned to its starting point. Below are the times he recorded. What is the
period of this pendulum?
A. 0.85 seconds
B. 1.7 seconds
C. 3.4 seconds
D. 8.5 seconds
Correct Answer: B. 1.7 seconds
Explanation: The period of a pendulum is the time it takes for one full back-and-forthswing. The
clockmaker clicked his stopwatch on each full swing, so he measured theperiod of the pendulum.
These measurements averaged 1.7 seconds.
You answered this question correctly!
3. A pendulum clock keeps accurate time on Earth. The clock is then moved to the Moon, wherethe force of
gravity is less than on Earth. What will happen?
A. The clock will keep accurate time on the Moon.
B. The clock will run too fast on the Moon.
C. The clock will run too slowly on the Moon.
D. The clock will stop completely on the Moon.
a
2/4
ASSESSMENT QUESTIONS:
Print Page
Q1 Q2 Q3 Q4 Q5 SCORE
Current Results NOT Saved 5/5
You have already taken this
assessment
Saved Results for 5/5
Period 8
Questions & Answers
1. The clock shown below is running too slow. If a clock maker was called to fix it, what couldshe do to
make it run faster?
A. She could increase the starting angle of the swing.
B. She could increase the mass of the bob.
C. She could shorten the length of the pendulum.
D. She could increase the length of the pendulum.
Correct Answer: C. She could shorten the length of the pendulum.
Explanation: If a pendulum clock is running too slow, the period of its pendulum must be
1/4
, Pendulum Clock Gizmo : ExploreLearning
too long. The period is mostly determined by the length of the pendulum. The periodincreases
as the pendulum gets longer, and decreases as it gets shorter. Therefore, making the pendulum
shorter will speed up the clock.
Changing the mass of the bob has no effect on the pendulum period. Increasing thestarting
angle might increase the period slightly, but will not decrease the period.
You answered this question correctly!
2. A clockmaker tested a pendulum with a stopwatch. He clicked the stopwatch each time the pendulum
clock finished a full swing and returned to its starting point. Below are the times he recorded. What is the
period of this pendulum?
A. 0.85 seconds
B. 1.7 seconds
C. 3.4 seconds
D. 8.5 seconds
Correct Answer: B. 1.7 seconds
Explanation: The period of a pendulum is the time it takes for one full back-and-forthswing. The
clockmaker clicked his stopwatch on each full swing, so he measured theperiod of the pendulum.
These measurements averaged 1.7 seconds.
You answered this question correctly!
3. A pendulum clock keeps accurate time on Earth. The clock is then moved to the Moon, wherethe force of
gravity is less than on Earth. What will happen?
A. The clock will keep accurate time on the Moon.
B. The clock will run too fast on the Moon.
C. The clock will run too slowly on the Moon.
D. The clock will stop completely on the Moon.
a
2/4
