Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 608 · 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.🕰️ 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) one swing is too slow (d) it is more fun
2. 2.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a digital watch (c) a sundial (d) a phone
3. 3.⚖️ 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
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a stopwatch (c) a heavy nut or washer (d) a string
5. 5.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) yeast (d) a heavy nut or washer
7. 7.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) heavier (d) stopped
8. 8.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
9. 9.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a stopwatch (c) a ruler (d) a string
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is the one thing we change. (a) True (b) False
11. 11.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
12. 12.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) gravity (d) the wind
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we measure it (c) we keep it the same
14. 14.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is wet (d) it is magnetic
15. 15.⚖️ 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
16. 16.⚖️ 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
17. 17.🧺 Which of these is needed for the pendulum? (a) yeast (b) a magnet (c) a heavy nut or washer (d) a battery cell
18. 18.True or false: a string is not needed for the pendulum. (a) False (b) True
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we keep it the same (c) we measure it
20. 20.🔮 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
21. 21.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) a stopwatch (d) turmeric powder
22. 22.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is the one thing we change. (a) False (b) True
24. 24.⚖️ 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
25. 25.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
26. 26.🧺 Which of these is not needed for the pendulum? (a) a string (b) a mirror (c) a pencil and tape (d) a stopwatch
27. 27.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a glass bottle (d) a small nut or washer
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) False (b) True
29. 29.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a lighter bob (d) a heavier bob
30. 30.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
31. 31.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
32. 32.True or false: a string is needed for the pendulum. (a) False (b) True
33. 33.True or false: a balloon is not needed for the pendulum. (a) True (b) False
34. 34.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
35. 35.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a pencil and tape (c) a balloon (d) a magnet
36. 36.🧺 Which of these is needed for the pendulum? (a) a balloon (b) yeast (c) a string (d) a magnet
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) turmeric powder (c) a stopwatch (d) a string
38. 38.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
39. 39.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) a string (d) a magnet
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) False (b) True

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