Simple Pendulum Experiment Worksheet

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

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