Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 797 · 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.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) the bob could hit you (d) it is wet
2. 2.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) yeast (c) a ruler (d) a string
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? Which of these is the one thing we change? (a) the string length (b) the weight of the bob (c) the same hook (d) how far we pull it back
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we measure it (c) we keep it the same
6. 6.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
7. 7.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) one swing is too slow (c) it is more accurate (d) 10 is a lucky number
8. 8.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a pencil and tape (c) a heavy nut or washer (d) a ruler
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) how far we pull it back (c) time for 10 swings (d) the same hook
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) a battery cell (d) a string
11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) a string (d) a balloon
12. 12.True or false: a balloon is not needed for the pendulum. (a) True (b) False
13. 13.⚖️ 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 measure it (c) we keep it the same
14. 14.⚖️ 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
15. 15.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
16. 16.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a phone (c) a grandfather clock (d) a sundial
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the weight of the bob
18. 18.🕰️ 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
19. 19.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 39 seconds?
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) how far we pull it back (c) time for 10 swings
21. 21.True or false: yeast is not needed for the pendulum. (a) True (b) False
22. 22.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) gravity (c) magnetism (d) the wind
23. 23.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
24. 24.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) turmeric powder (c) a pencil and tape (d) a string
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a pencil and tape (c) a stopwatch (d) a string
27. 27.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a battery cell (c) a pencil and tape (d) a string
28. 28.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
30. 30.⚖️ 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
31. 31.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
32. 32.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
33. 33.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 36 seconds?
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a mirror (c) a string (d) a heavy nut or washer
35. 35.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) about the same (d) it cannot swing
36. 36.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a stopwatch (c) a string (d) a heavy nut or washer
37. 37.True or false: a ruler is needed for the pendulum. (a) False (b) True
38. 38.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a longer string (c) a shorter string (d) a heavier bob
39. 39.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a stopwatch (c) a heavy nut or washer (d) a balloon
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True

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