Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 153 · 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 sharp tool (b) a glass bottle (c) a heavy brick (d) a small nut or washer
2. 2.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a longer string (d) a shorter string
3. 3.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is magnetic (c) it is wet (d) it is hot
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we change it (c) we measure it
5. 5.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it stays the same (c) it halves (d) it becomes 4 times
6. 6.⚖️ 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) time for 10 swings (d) the same hook
7. 7.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
8. 8.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a pencil and tape (c) a ruler (d) a heavy nut or washer
10. 10.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) it is more accurate (c) one swing is too slow (d) 10 is a lucky number
11. 11.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) a ruler (d) a balloon
12. 12.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
13. 13.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a string (c) a battery cell (d) a mirror
14. 14.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) a pencil and tape (d) a magnet
15. 15.⚖️ 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
16. 16.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) gravity (c) the wind (d) magnetism
17. 17.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
18. 18.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) the weight of the bob (c) the same hook (d) how far we pull it back
20. 20.⚖️ 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
21. 21.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) it stops swinging (c) no, hardly at all (d) yes, much slower
22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a magnet (c) a heavy nut or washer (d) a string
23. 23.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
24. 24.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) about the same (d) much faster
25. 25.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
26. 26.True or false: a balloon is needed for the pendulum. (a) True (b) False
27. 27.⚖️ 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 keep it the same (b) we change it (c) we measure it
28. 28.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a string (d) a mirror
29. 29.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
30. 30.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
31. 31.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) heavier (d) stopped
32. 32.⚖️ 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
33. 33.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
34. 34.True or false: a mirror is not needed for the pendulum. (a) True (b) False
35. 35.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
36. 36.True or false: yeast is not needed for the pendulum. (a) True (b) False
37. 37.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a phone (d) a grandfather clock
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a balloon (c) a pencil and tape (d) a string
39. 39.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
40. 40.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 32 seconds?

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