Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 354 · 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 heavy brick (b) a sharp tool (c) a glass bottle (d) a small nut or washer
2. 2.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
3. 3.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a longer string (d) a shorter string
4. 4.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a phone (c) a digital watch (d) a grandfather clock
5. 5.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
6. 6.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a mirror (c) turmeric powder (d) a balloon
7. 7.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
8. 8.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is wet (c) it is magnetic (d) it is hot
9. 9.🔮 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 halves (d) it doubles
10. 10.🧺 Which of these is not needed for the pendulum? (a) a string (b) a balloon (c) a pencil and tape (d) a heavy nut or washer
11. 11.⚖️ 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 measure it (c) we keep it the same
12. 12.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more accurate (c) one swing is too slow (d) it is more fun
13. 13.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) the wind (c) gravity (d) magnetism
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a stopwatch (d) a magnet
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) False (b) True
16. 16.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
17. 17.⚖️ 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
18. 18.⚖️ 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 same hook (c) the string length
19. 19.True or false: a ruler is not needed for the pendulum. (a) False (b) True
20. 20.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) how far we pull it back (c) the same hook (d) the weight of the bob
22. 22.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
23. 23.⚖️ 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
24. 24.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
25. 25.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a mirror (d) a pencil and tape
27. 27.⚖️ 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
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is kept the same. (a) True (b) False
29. 29.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
30. 30.⚖️ 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
31. 31.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) heavier (c) slower (d) stopped
32. 32.⚖️ 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) False (b) True
33. 33.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 17 seconds?
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) False (b) True
35. 35.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) about the same (c) much slower (d) much faster
36. 36.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) turmeric powder (d) a stopwatch
38. 38.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) yes, much faster (c) it stops swinging (d) no, hardly at all
39. 39.True or false: a balloon is needed for the pendulum. (a) True (b) False
40. 40.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a string (c) a mirror (d) yeast

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