Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 961 · 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.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
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 change it (b) we keep it the same (c) we measure it
3. 3.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a stopwatch (c) a string (d) a heavy nut or washer
4. 4.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 36 seconds?
5. 5.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
6. 6.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it doubles (d) it stays the same
7. 7.🧺 Which of these is needed for the pendulum? (a) yeast (b) a magnet (c) a heavy nut or washer (d) a battery cell
8. 8.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a phone (c) a grandfather clock (d) a sundial
9. 9.True or false: a mirror is not needed for the pendulum. (a) True (b) False
10. 10.True or false: a pencil and tape 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 what we measure? (a) the same hook (b) the weight of the bob (c) time for 10 swings (d) how far we pull it back
12. 12.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 11 seconds?
13. 13.🛟 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
14. 14.⚖️ 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
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we change it (c) we measure it
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a magnet (c) a stopwatch (d) a string
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a battery cell (c) a string (d) a pencil and tape
18. 18.True or false: a battery cell is needed for the pendulum. (a) True (b) False
19. 19.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) no, hardly at all (c) yes, much faster (d) it stops swinging
20. 20.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
21. 21.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) stopped (c) heavier (d) slower
22. 22.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) gravity (c) the string (d) magnetism
23. 23.🧺 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) yeast (d) a ruler
24. 24.⚖️ 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) the string length (c) the weight of the bob (d) how far we pull it back
25. 25.True or false: a magnet is needed for the pendulum. (a) False (b) True
26. 26.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
27. 27.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
28. 28.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 33 seconds?
29. 29.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
30. 30.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 12 seconds?
31. 31.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
32. 32.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) yeast (d) a heavy nut or washer
33. 33.True or false: yeast is not needed for the pendulum. (a) True (b) False
34. 34.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a sharp tool (d) a small nut or washer
35. 35.🕰️ 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) it is more fun (d) one swing is too slow
36. 36.⚖️ 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
37. 37.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) much slower (d) about the same
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a balloon (d) a heavy nut or washer
39. 39.⚖️ 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
40. 40.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a stopwatch (c) a pencil and tape (d) turmeric powder

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