Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 389 · 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 is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a small nut or washer (d) a heavy brick
2. 2.⚖️ 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 keep it the same (c) we measure it
3. 3.🧺 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 magnet
4. 4.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is wet (d) it is magnetic
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) turmeric powder (d) a pencil and tape
6. 6.⚖️ 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 weight of the bob (c) the string length
7. 7.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) about the same (c) it cannot swing (d) much slower
8. 8.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a string (c) yeast (d) a pencil and tape
9. 9.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
10. 10.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) turmeric powder (c) yeast (d) a string
11. 11.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
12. 12.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
13. 13.🧺 Which of these is not needed for the pendulum? (a) a string (b) turmeric powder (c) a ruler (d) a heavy nut or washer
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a ruler (d) a mirror
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True
16. 16.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a grandfather clock (c) a phone (d) a digital watch
17. 17.True or false: a mirror is not needed for the pendulum. (a) True (b) False
18. 18.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
19. 19.True or false: a string is needed for the pendulum. (a) False (b) True
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a battery cell (d) a pencil and tape
21. 21.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
22. 22.True or false: yeast is not needed for the pendulum. (a) False (b) True
23. 23.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) a stopwatch (d) a magnet
24. 24.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
25. 25.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a balloon (c) a pencil and tape (d) a magnet
26. 26.True or false: a balloon is not needed for the pendulum. (a) False (b) True
27. 27.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
28. 28.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
29. 29.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
30. 30.⚖️ 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
31. 31.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a magnet (c) a ruler (d) a pencil and tape
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a stopwatch (d) yeast
33. 33.⚖️ 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 keep it the same (c) we change it
34. 34.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) how far we pull it back (c) the same hook (d) time for 10 swings
36. 36.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) no, hardly at all (c) it stops swinging (d) yes, much slower
37. 37.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
38. 38.⚖️ 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
39. 39.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a longer string (c) a heavier bob (d) a shorter string
40. 40.⚖️ 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

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