Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 917 · 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.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a phone (c) a digital watch (d) a sundial
2. 2.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is wet (d) it is magnetic
3. 3.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it becomes 4 times (d) it doubles
4. 4.⚖️ 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 measure it (c) we change it
5. 5.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 36 seconds?
6. 6.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
7. 7.⚖️ 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
8. 8.⚖️ 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) the string length (c) time for 10 swings
9. 9.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a glass bottle (d) a small nut or washer
10. 10.True or false: a magnet is not needed for the pendulum. (a) False (b) True
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) True (b) False
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
13. 13.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) quicker (c) slower (d) stopped
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) False (b) True
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “how far we pull it back”? (a) we measure it (b) we change it (c) we keep it the same
16. 16.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
17. 17.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a magnet (c) a stopwatch (d) a heavy nut or washer
18. 18.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a battery cell (c) a pencil and tape (d) yeast
19. 19.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) 10 is a lucky number (c) it is more fun (d) one swing is too slow
20. 20.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a balloon (c) a stopwatch (d) a heavy nut or washer
21. 21.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 12 seconds?
22. 22.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
23. 23.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
24. 24.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) no, hardly at all (c) yes, much slower (d) it stops swinging
25. 25.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a heavy nut or washer (c) a battery cell (d) a magnet
26. 26.⚖️ 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
27. 27.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) a ruler (d) a mirror
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) how far we pull it back
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the same hook (b) the weight of the bob (c) the string length (d) time for 10 swings
30. 30.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) much faster (d) it cannot swing
31. 31.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
32. 32.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
33. 33.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
34. 34.True or false: a mirror is not needed for the pendulum. (a) True (b) False
35. 35.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 14 seconds?
36. 36.⚖️ 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
37. 37.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
38. 38.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 7 seconds?
39. 39.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
40. 40.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?

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