Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 2 · 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 pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
2. 2.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a heavier bob (c) a shorter string (d) a lighter bob
3. 3.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) True (b) False
5. 5.⚖️ 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
6. 6.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 28 seconds?
7. 7.⚖️ 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) True (b) False
8. 8.True or false: a string is not needed for the pendulum. (a) True (b) False
9. 9.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) heavier (c) stopped (d) slower
10. 10.⚖️ 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) the string length (c) time for 10 swings (d) the same hook
11. 11.⚖️ 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
12. 12.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a heavy brick (d) a small nut or washer
13. 13.🧺 Which of these is needed for the pendulum? (a) a balloon (b) yeast (c) a battery cell (d) a string
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a stopwatch (c) a heavy nut or washer (d) a string
15. 15.True or false: a balloon is not needed for the pendulum. (a) True (b) False
16. 16.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
17. 17.⚖️ 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 measure it (c) we change it
18. 18.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) it stops swinging (c) no, hardly at all (d) yes, much faster
19. 19.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 51 seconds?
20. 20.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
21. 21.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
22. 22.⚖️ 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) True (b) False
23. 23.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a battery cell (d) a stopwatch
25. 25.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
26. 26.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
27. 27.⚖️ 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) False (b) True
28. 28.🧺 Which of these is needed for the pendulum? (a) a magnet (b) turmeric powder (c) a heavy nut or washer (d) a battery cell
29. 29.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) gravity (c) magnetism (d) the string
30. 30.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it doubles (d) it stays the same
31. 31.⚖️ 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
32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) how far we pull it back (b) the weight of the bob (c) the string length (d) time for 10 swings
33. 33.🛟 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
34. 34.True or false: a battery cell is needed for the pendulum. (a) True (b) False
35. 35.⚖️ 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
36. 36.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
37. 37.🧺 Which of these is not needed for the pendulum? (a) a string (b) a magnet (c) a heavy nut or washer (d) a ruler
38. 38.⚖️ 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
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) turmeric powder (d) a string
40. 40.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a phone (c) a sundial (d) a digital watch

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