Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 485 · 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.⚖️ 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
2. 2.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a stopwatch (c) a ruler (d) a heavy nut or washer
3. 3.⚖️ 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
4. 4.⚖️ 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
5. 5.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
6. 6.⚖️ 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
7. 7.🛟 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
8. 8.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
9. 9.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
10. 10.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) yeast (c) a string (d) a pencil and tape
12. 12.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) quicker (d) slower
13. 13.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a small nut or washer (d) a sharp tool
14. 14.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) it stops swinging (c) yes, much slower (d) no, hardly at all
15. 15.True or false: yeast is needed for the pendulum. (a) True (b) False
16. 16.🕰️ 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
17. 17.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) yeast (c) turmeric powder (d) a battery cell
18. 18.True or false: yeast is not needed for the pendulum. (a) False (b) True
19. 19.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a lighter bob (d) a heavier bob
20. 20.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
21. 21.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
22. 22.⚖️ 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 measure it (b) we change it (c) we keep it the same
23. 23.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) True (b) False
25. 25.⚖️ 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 change it (c) we keep it the same
26. 26.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
27. 27.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a stopwatch (c) a pencil and tape (d) a string
28. 28.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 13 seconds?
29. 29.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) the wind (c) magnetism (d) gravity
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) True (b) False
31. 31.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) turmeric powder (c) a mirror (d) a battery cell
32. 32.True or false: a mirror is needed for the pendulum. (a) True (b) False
33. 33.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
34. 34.⚖️ 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) how far we pull it back (c) time for 10 swings (d) the string length
35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) time for 10 swings (c) the string length
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a balloon (d) a stopwatch
37. 37.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a stopwatch (c) a battery cell (d) a pencil and tape
38. 38.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a sundial (d) a digital watch
39. 39.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
40. 40.⚖️ 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

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