Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 321 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a pencil and tape (c) turmeric powder (d) a ruler
2. 2.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we measure it (c) we keep it the same
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.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a sundial (c) a digital watch (d) a phone
6. 6.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) it is wet (d) the bob could hit you
7. 7.True or false: a magnet is needed for the pendulum. (a) True (b) False
8. 8.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) a pencil and tape (d) yeast
9. 9.⚖️ 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
10. 10.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a balloon (c) a magnet (d) yeast
11. 11.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
12. 12.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
13. 13.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it doubles (d) it halves
14. 14.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) quicker (d) stopped
15. 15.🧺 Which of these is needed for the pendulum? (a) a balloon (b) turmeric powder (c) a mirror (d) a stopwatch
16. 16.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 15 seconds?
17. 17.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
18. 18.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) yeast (d) a ruler
19. 19.True or false: a string is not needed for the pendulum. (a) True (b) False
20. 20.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
21. 21.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
22. 22.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 6 seconds?
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a battery cell (c) a ruler (d) a string
24. 24.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the string (d) the wind
25. 25.🛟 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
26. 26.⚖️ 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
27. 27.🧺 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
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) the string length (c) how far we pull it back (d) the same hook
29. 29.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a mirror (c) a pencil and tape (d) a ruler
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) False (b) True
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) time for 10 swings (c) the same hook (d) the weight of the bob
32. 32.🧺 Which of these is not needed for the pendulum? (a) a string (b) a pencil and tape (c) a stopwatch (d) a balloon
33. 33.True or false: a mirror is not needed for the pendulum. (a) False (b) True
34. 34.True or false: a ruler is not needed for the pendulum. (a) False (b) True
35. 35.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a mirror (c) a heavy nut or washer (d) a stopwatch
37. 37.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
38. 38.⚖️ 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
39. 39.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) no, hardly at all (c) yes, much faster (d) it stops swinging
40. 40.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed

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