Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 21 · 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 needed for the pendulum? (a) a pencil and tape (b) yeast (c) a magnet (d) a mirror
2. 2.⚖️ 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) time for 10 swings (c) the string length (d) the weight of the bob
3. 3.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) no, hardly at all (c) it stops swinging (d) yes, much faster
4. 4.⚖️ 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
5. 5.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a sharp tool (d) a heavy brick
6. 6.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
7. 7.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it halves (c) it stays the same (d) it doubles
8. 8.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
9. 9.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) about the same (d) it cannot swing
10. 10.True or false: a mirror is needed for the pendulum. (a) False (b) True
11. 11.True or false: yeast is not needed for the pendulum. (a) False (b) True
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a heavy nut or washer (d) yeast
13. 13.⚖️ 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
14. 14.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a mirror (c) turmeric powder (d) a balloon
15. 15.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we keep it the same (c) we measure it
17. 17.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) turmeric powder (c) a heavy nut or washer (d) a string
18. 18.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
19. 19.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more fun (c) one swing is too slow (d) it is more accurate
20. 20.⚖️ 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
21. 21.True or false: a ruler is not needed for the pendulum. (a) False (b) True
22. 22.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a heavier bob (d) a lighter bob
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a balloon (d) a stopwatch
24. 24.🧺 Which of these is not needed for the pendulum? (a) a string (b) a balloon (c) a ruler (d) a pencil and tape
25. 25.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
26. 26.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 45 seconds?
27. 27.⚖️ 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
28. 28.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
29. 29.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a digital watch (c) a grandfather clock (d) a sundial
30. 30.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 12 seconds?
31. 31.⚖️ 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 string length (c) the weight of the bob
32. 32.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
33. 33.⚖️ 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) True (b) False
34. 34.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
35. 35.⚖️ 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
36. 36.⚖️ 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
37. 37.⚖️ 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 change it (b) we measure it (c) we keep it the same
38. 38.⚖️ 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
39. 39.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) heavier (d) quicker
40. 40.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) the bob could hit you (d) it is hot

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