Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 986 · 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.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) magnetism (c) the wind (d) the string
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we change it (c) we measure it
3. 3.⚖️ 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
4. 4.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
5. 5.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) quicker (d) slower
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a heavy nut or washer (c) a stopwatch (d) a pencil and tape
7. 7.True or false: a ruler is needed for the pendulum. (a) False (b) True
8. 8.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
9. 9.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
10. 10.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) 10 is a lucky number (c) it is more accurate (d) one swing is too slow
11. 11.🧺 Which of these is not needed for the pendulum? (a) a string (b) a heavy nut or washer (c) a balloon (d) a ruler
12. 12.🧺 Which of these is not needed for the pendulum? (a) a string (b) yeast (c) a stopwatch (d) a heavy nut or washer
13. 13.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a digital watch (c) a grandfather clock (d) a sundial
14. 14.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
15. 15.⚖️ 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) time for 10 swings (d) the string length
16. 16.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is hot (c) it is magnetic (d) the bob could hit you
17. 17.⚖️ 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
18. 18.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a magnet (c) a ruler (d) turmeric powder
19. 19.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a ruler (d) a battery cell
20. 20.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much slower (c) it stops swinging (d) yes, much faster
21. 21.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a stopwatch (c) yeast (d) turmeric powder
22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a ruler (c) a heavy nut or washer (d) a stopwatch
23. 23.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a shorter string (d) a longer string
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
25. 25.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a small nut or washer (c) a glass bottle (d) a sharp tool
26. 26.🧺 Which of these is needed for the pendulum? (a) a mirror (b) yeast (c) turmeric powder (d) a pencil and tape
27. 27.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
28. 28.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
29. 29.⚖️ 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 measure it (c) we change it
30. 30.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a mirror (d) a ruler
31. 31.True or false: yeast is not needed for the pendulum. (a) True (b) False
32. 32.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a magnet (c) a heavy nut or washer (d) yeast
33. 33.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) much faster (c) about the same (d) it cannot swing
34. 34.⚖️ 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 change it (c) we measure it
35. 35.True or false: yeast is needed for the pendulum. (a) False (b) True
36. 36.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
37. 37.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
38. 38.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
39. 39.⚖️ 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
40. 40.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed

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