Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 529 · 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 heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) about the same (d) it cannot swing
2. 2.🧺 Which of these is not needed for the pendulum? (a) a string (b) turmeric powder (c) a pencil and tape (d) a heavy nut or washer
3. 3.🧺 Which of these is not needed for the pendulum? (a) a string (b) yeast (c) a heavy nut or washer (d) a ruler
4. 4.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) it is more fun (c) 10 is a lucky number (d) one swing is too slow
5. 5.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
6. 6.🧺 Which of these is needed for the pendulum? (a) a mirror (b) turmeric powder (c) a magnet (d) a stopwatch
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) the weight of the bob (c) the string length (d) time for 10 swings
8. 8.⚖️ 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
9. 9.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a heavy nut or washer (c) a ruler (d) a string
10. 10.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
11. 11.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) no, hardly at all (c) it stops swinging (d) yes, much slower
12. 12.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a small nut or washer (d) a heavy brick
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 measure it (b) we change it (c) we keep it the same
14. 14.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
15. 15.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
16. 16.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
17. 17.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
18. 18.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
19. 19.⚖️ 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
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a ruler (c) a heavy nut or washer (d) a pencil and tape
22. 22.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) a balloon (d) a heavy nut or washer
23. 23.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a shorter string (c) a longer string (d) a heavier bob
24. 24.True or false: a magnet is not needed for the pendulum. (a) False (b) True
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) the string length (c) the weight of the bob
26. 26.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) the bob could hit you (d) it is wet
27. 27.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 16 seconds?
28. 28.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) quicker (c) slower (d) stopped
29. 29.⚖️ 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 same hook
30. 30.⚖️ 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 keep it the same (b) we measure it (c) we change it
31. 31.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a phone (c) a digital watch (d) a sundial
32. 32.True or false: a balloon is not needed for the pendulum. (a) False (b) True
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a balloon (c) a heavy nut or washer (d) a string
34. 34.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 24 seconds?
35. 35.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 30 seconds?
36. 36.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
37. 37.⚖️ 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
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a string (d) yeast
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we keep it the same (c) we change it
40. 40.⚖️ 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

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