Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 940 · 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.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) it stops swinging (c) yes, much faster (d) no, hardly at all
2. 2.True or false: a mirror is needed for the pendulum. (a) True (b) False
3. 3.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) heavier (d) quicker
4. 4.True or false: a ruler is needed for the pendulum. (a) True (b) False
5. 5.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a magnet (c) a pencil and tape (d) a battery cell
6. 6.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) how far we pull it back (c) the string length (d) the weight of the bob
8. 8.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
9. 9.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
10. 10.⚖️ 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
11. 11.⚖️ 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
12. 12.⚖️ 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
13. 13.🧺 Which of these is not needed for the pendulum? (a) a string (b) a heavy nut or washer (c) a magnet (d) a ruler
14. 14.🛟 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
15. 15.True or false: yeast is needed for the pendulum. (a) False (b) True
16. 16.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a longer string (c) a heavier bob (d) a shorter string
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a balloon (c) a string (d) a ruler
18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) yeast (d) a string
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a mirror (d) a heavy nut or washer
20. 20.⚖️ 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 keep it the same (c) we measure it
21. 21.True or false: a mirror is not needed for the pendulum. (a) False (b) True
22. 22.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it doubles (c) it stays the same (d) it becomes 4 times
23. 23.True or false: a battery cell is needed for the pendulum. (a) False (b) True
24. 24.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a phone (c) a grandfather clock (d) a digital watch
25. 25.True or false: a string is not needed for the pendulum. (a) True (b) False
26. 26.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
27. 27.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
28. 28.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a battery cell (d) a stopwatch
29. 29.⚖️ 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) time for 10 swings (d) the string length
30. 30.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) one swing is too slow (c) 10 is a lucky number (d) it is more accurate
31. 31.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
32. 32.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
33. 33.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a small nut or washer (d) a glass bottle
34. 34.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
35. 35.🧺 Which of these is needed for the pendulum? (a) a magnet (b) turmeric powder (c) a balloon (d) a heavy nut or washer
36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) True (b) False
37. 37.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) gravity (d) the wind
38. 38.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a heavy nut or washer (c) a string (d) a stopwatch
39. 39.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
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) True (b) False

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