Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 390 · 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.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) a battery cell (d) a heavy nut or washer
2. 2.⚖️ 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
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the same hook (b) how far we pull it back (c) time for 10 swings (d) the string length
4. 4.🔮 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 becomes 4 times (d) it doubles
5. 5.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) it is hot (d) the bob could hit you
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a balloon (d) a pencil and tape
7. 7.⚖️ 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
8. 8.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
9. 9.🧺 Which of these is needed for the pendulum? (a) yeast (b) a pencil and tape (c) a balloon (d) turmeric powder
10. 10.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
11. 11.⚖️ 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
12. 12.⚖️ 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 change it (c) we keep it the same
13. 13.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
14. 14.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more fun (c) it is more accurate (d) one swing is too slow
15. 15.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
16. 16.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
17. 17.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
18. 18.True or false: a mirror is needed for the pendulum. (a) False (b) True
19. 19.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a heavy brick (d) a sharp tool
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is the one thing we change. (a) False (b) True
21. 21.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 8 seconds?
22. 22.True or false: a battery cell is needed for the pendulum. (a) False (b) True
23. 23.🧺 Which of these is needed for the pendulum? (a) a magnet (b) turmeric powder (c) a mirror (d) a string
24. 24.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) a ruler (d) turmeric powder
25. 25.⚖️ 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 measure it (c) we change it
26. 26.⚖️ 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
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a string (c) a heavy nut or washer (d) a stopwatch
28. 28.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) gravity (c) the string (d) magnetism
29. 29.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a digital watch (c) a sundial (d) a phone
30. 30.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 20 seconds?
31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a magnet (c) a stopwatch (d) a string
32. 32.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
33. 33.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a pencil and tape (c) a ruler (d) a stopwatch
34. 34.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much faster (c) it stops swinging (d) yes, much slower
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a stopwatch (d) yeast
36. 36.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
37. 37.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 14 seconds?
38. 38.🔮 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
39. 39.🧺 Which of these is not needed for the pendulum? (a) a string (b) a mirror (c) a pencil and tape (d) a heavy nut or washer
40. 40.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a lighter bob (c) a shorter string (d) a heavier bob

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