Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 501 · 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 of these is not needed for the pendulum? (a) a magnet (b) a string (c) a pencil and tape (d) a heavy nut or washer
2. 2.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a sundial (d) a phone
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a string (d) turmeric powder
4. 4.⚖️ 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) the weight of the bob
5. 5.True or false: a string is not needed for the pendulum. (a) True (b) False
6. 6.True or false: a ruler is not needed for the pendulum. (a) False (b) True
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) a ruler (d) a magnet
8. 8.True or false: a mirror is not needed for the pendulum. (a) False (b) True
9. 9.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is hot (d) it is wet
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) time for 10 swings (c) the string length
11. 11.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) about the same (d) much faster
12. 12.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) turmeric powder (d) a heavy nut or washer
13. 13.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
14. 14.🛟 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
15. 15.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
16. 16.⚖️ 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 measure it (c) we keep it the same
17. 17.True or false: yeast is needed for the pendulum. (a) True (b) False
18. 18.⚖️ 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) True (b) False
19. 19.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) the wind (d) gravity
20. 20.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
21. 21.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) quicker (d) stopped
22. 22.True or false: yeast is not needed for the pendulum. (a) False (b) True
23. 23.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
24. 24.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 26 seconds?
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we measure it (c) we keep it the same
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a balloon (d) a stopwatch
28. 28.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it doubles (d) it halves
29. 29.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
30. 30.⚖️ 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 change it (c) we measure it
31. 31.⚖️ 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) True (b) False
32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) how far we pull it back (c) the string length (d) time for 10 swings
33. 33.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
34. 34.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
35. 35.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 36 seconds?
36. 36.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a shorter string (c) a lighter bob (d) a heavier bob
37. 37.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more accurate (c) it is more fun (d) one swing is too slow
38. 38.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
39. 39.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
40. 40.⚖️ 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

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