Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 979 · 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.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is magnetic (c) it is hot (d) it is wet
2. 2.⚖️ 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) True (b) False
3. 3.⚖️ 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
4. 4.True or false: yeast is needed for the pendulum. (a) False (b) True
5. 5.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a heavy brick (d) a sharp tool
6. 6.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it doubles (d) it halves
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) turmeric powder (d) a string
8. 8.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
9. 9.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) stopped (d) heavier
10. 10.⚖️ 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 change it (c) we keep it the same
11. 11.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a ruler (c) a string (d) a heavy nut or washer
12. 12.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
13. 13.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 9 seconds?
14. 14.True or false: a battery cell is needed for the pendulum. (a) True (b) False
15. 15.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a balloon (c) a battery cell (d) a heavy nut or washer
16. 16.True or false: a string is not needed for the pendulum. (a) False (b) True
17. 17.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we keep it the same (c) we change it
19. 19.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) turmeric powder (c) yeast (d) a magnet
20. 20.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
21. 21.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
22. 22.True or false: a mirror is needed for the pendulum. (a) False (b) True
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) the string length (c) time for 10 swings
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we keep it the same (c) we change it
25. 25.⚖️ 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 string length (c) the same hook (d) the weight of the bob
26. 26.True or false: a ruler is not needed for the pendulum. (a) False (b) True
27. 27.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a mirror (c) a ruler (d) a heavy nut or washer
29. 29.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
30. 30.True or false: a mirror is not needed for the pendulum. (a) False (b) True
31. 31.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a heavier bob (d) a longer string
32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) True (b) False
33. 33.⚖️ 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) False (b) True
34. 34.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) a mirror (d) a ruler
35. 35.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much slower (c) much faster (d) it cannot swing
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a battery cell (d) a ruler
37. 37.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?
38. 38.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a phone (c) a digital watch (d) a grandfather clock
39. 39.⚖️ 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
40. 40.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a magnet (c) a string (d) turmeric powder

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