Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 223 · 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.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) no, hardly at all (c) yes, much slower (d) yes, much faster
2. 2.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) a heavy nut or washer (d) a balloon
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a battery cell (c) a stopwatch (d) a heavy nut or washer
4. 4.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a mirror (c) yeast (d) a ruler
5. 5.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
6. 6.⚖️ 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 weight of the bob (c) the string length (d) time for 10 swings
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
8. 8.⚖️ 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) False (b) True
9. 9.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
10. 10.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
11. 11.🧺 Which of these is not needed for the pendulum? (a) a string (b) a stopwatch (c) a balloon (d) a heavy nut or washer
12. 12.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
13. 13.⚖️ 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
14. 14.🛟 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
15. 15.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
16. 16.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
17. 17.🛟 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
18. 18.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
19. 19.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we measure it (c) we keep it the same
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a heavy nut or washer (c) a stopwatch (d) a string
22. 22.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
23. 23.True or false: a string is needed for the pendulum. (a) False (b) True
24. 24.⚖️ 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
25. 25.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
26. 26.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) about the same (d) much slower
27. 27.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a digital watch (d) a grandfather clock
28. 28.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) a ruler (d) a battery cell
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a magnet (c) a ruler (d) a string
30. 30.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it stays the same (c) it doubles (d) it becomes 4 times
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we measure it (c) we change it
32. 32.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
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 keep it the same (b) we measure it (c) we change it
34. 34.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) heavier (d) stopped
35. 35.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
36. 36.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
37. 37.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
38. 38.⚖️ 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
39. 39.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) one swing is too slow (c) 10 is a lucky number (d) it is more fun
40. 40.⚖️ 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

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