Lesson P1-09-1 Post-Lecture Quiz

QuizÂ by Zach Baudoin

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5 questions
• Q1
A perfectly elastic ball is dropped from rest from a height 5 m above a floor. What is the period of the ball's motion as it bounces back up repeatedly to the same height?
4 s
5 s
2 s
3 s
1 s
30s
• Q2
If a 5 kg object oscillates with a period of 2 seconds on a spring, then the spring constant is most nearly...
50 N/m
20 N/m
10 N/m
30 N/m
40 N/m
30s
• Q3
What length must a simple pendulum's string have if the pendulum oscillates so that it takes 1 second to swing forward and 1 second to swing backward?
0.5 m
1 m
2 m
0.25 m
0.4 m
30s
• Q4
A mass on the end of a spring oscillates with period T1. An equal mass on the end of a string oscillates as a pendulum with period T2. Suppose each mass is multiplied by 4. What happens to each period?
T1 stays the same and T2 increases
T1 increases and T2 stays the same
T1 stays the same and T2 decreases
T1 stays the same and T2 stays the same
T1 increases and T2 increases
30s
• Q5
A mass on the end of a spring oscillates with period T1. An equal mass on the end of a string oscillates as a pendulum with period T2. Suppose each system is taken to a planet with four times the gravitational field. What happens to each period?
T1 stays the same and T2 decreases.
T1 decreases and T2 stays the same.
T1 stays the same and T2 stays the same.
T1 increases and T2 stays the same.
T1 increases and T2 decreases.
30s

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