Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 625 · 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? True or false: how far we pull it back is what we measure. (a) True (b) False
2. 2.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
3. 3.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) the string length (c) time for 10 swings
5. 5.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a magnet (c) a string (d) a ruler
7. 7.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) it is more fun (c) 10 is a lucky number (d) one swing is too slow
8. 8.⚖️ 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 keep it the same (c) we measure it
9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a heavy nut or washer (c) a stopwatch (d) a string
10. 10.⚖️ 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) how far we pull it back (c) the string length (d) the weight of the bob
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) the same hook (c) how far we pull it back (d) the string length
12. 12.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) it is wet (d) the bob could hit you
13. 13.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) it cannot swing (c) much slower (d) about the same
14. 14.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
15. 15.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a stopwatch (c) a pencil and tape (d) a string
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a heavy nut or washer (c) a stopwatch (d) a string
17. 17.⚖️ 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 change it (c) we keep it the same
18. 18.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 27 seconds?
19. 19.⚖️ 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
20. 20.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) heavier (d) quicker
21. 21.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) magnetism (c) the string (d) gravity
22. 22.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
23. 23.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a mirror (c) a stopwatch (d) yeast
24. 24.⚖️ 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
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a pencil and tape (d) a battery cell
26. 26.⚖️ 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
27. 27.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
28. 28.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) yeast (c) a ruler (d) a magnet
29. 29.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 20 seconds?
30. 30.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a lighter bob (c) a shorter string (d) a heavier bob
31. 31.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a digital watch (c) a phone (d) a sundial
32. 32.True or false: a magnet is needed for the pendulum. (a) False (b) True
33. 33.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
34. 34.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a mirror (c) a ruler (d) a string
36. 36.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
37. 37.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it becomes 4 times (d) it doubles
38. 38.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
39. 39.⚖️ 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
40. 40.⚖️ 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

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