Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 719 · 40 questions

What you do (Only the length matters): 1. Tie the nut to the string and hang it from the taped pencil, 30 cm long. 2. Pull it a little to one side and let go — do not push. 3. Time 10 swings and divide by 10. 4. Change only the string length (60 cm), time 10 swings again, and stand back from the bob.

1. 1.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
2. 2.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we change it (c) we measure it
4. 4.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a small nut or washer (c) a sharp tool (d) a heavy brick
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) True (b) False
7. 7.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is hot (c) it is magnetic (d) the bob could hit you
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we measure it (c) we change it
9. 9.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
10. 10.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
12. 12.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a battery cell (c) a string (d) a ruler
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a mirror (d) a heavy nut or washer
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) the string length (c) the weight of the bob (d) how far we pull it back
15. 15.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a phone (d) a sundial
16. 16.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a magnet (c) a pencil and tape (d) turmeric powder
17. 17.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it becomes 4 times (d) it stays the same
18. 18.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) heavier (d) quicker
19. 19.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a string (c) a mirror (d) turmeric powder
20. 20.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) yeast (d) a heavy nut or washer
21. 21.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a pencil and tape (c) a ruler (d) a stopwatch
22. 22.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a magnet (c) a string (d) a heavy nut or washer
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) time for 10 swings (c) the string length
24. 24.True or false: a ruler is not needed for the pendulum. (a) False (b) True
25. 25.True or false: a mirror is needed for the pendulum. (a) False (b) True
26. 26.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
27. 27.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
28. 28.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) a string (d) turmeric powder
29. 29.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) about the same (d) much slower
30. 30.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a shorter string (d) a longer string
31. 31.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a mirror (d) a string
32. 32.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
33. 33.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
34. 34.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?
35. 35.True or false: a ruler is needed for the pendulum. (a) False (b) True
36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) the weight of the bob (c) the same hook (d) the string length
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is kept the same. (a) False (b) True
38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we change it (c) we measure it
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we change it (c) we measure it
40. 40.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 20 seconds?

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