Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 735 · 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.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) slower (d) quicker
2. 2.🧺 Which of these is needed for the pendulum? (a) yeast (b) a mirror (c) a ruler (d) a balloon
3. 3.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a small nut or washer (d) a sharp tool
4. 4.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a string (c) a heavy nut or washer (d) a ruler
5. 5.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?
6. 6.⚖️ 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
7. 7.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) magnetism (c) the wind (d) the string
8. 8.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it doubles (c) it halves (d) it stays the same
9. 9.🧺 Which of these is needed for the pendulum? (a) yeast (b) a magnet (c) a pencil and tape (d) a mirror
10. 10.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) turmeric powder (c) a battery cell (d) a magnet
11. 11.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) a mirror (d) a string
12. 12.⚖️ 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) the same hook (c) the weight of the bob (d) the string length
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.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
15. 15.True or false: a balloon is needed for the pendulum. (a) True (b) False
16. 16.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a string (c) a stopwatch (d) turmeric powder
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a stopwatch (c) a string (d) a pencil and tape
18. 18.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a ruler (c) a heavy nut or washer (d) a balloon
19. 19.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a phone (c) a grandfather clock (d) a sundial
20. 20.⚖️ 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
21. 21.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
22. 22.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) it cannot swing (c) about the same (d) much slower
23. 23.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 17 seconds?
24. 24.⚖️ 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 weight of the bob (c) the string length (d) how far we pull it back
25. 25.⚖️ 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
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a magnet (c) a ruler (d) a heavy nut or washer
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a string (c) a pencil and tape (d) a stopwatch
28. 28.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
29. 29.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a ruler (d) yeast
30. 30.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
31. 31.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
32. 32.True or false: a string is not needed for the pendulum. (a) False (b) True
33. 33.⚖️ 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 change it (c) we measure it
34. 34.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 27 seconds?
35. 35.True or false: yeast is needed for the pendulum. (a) True (b) False
36. 36.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a shorter string (d) a longer string
37. 37.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 36 seconds?
38. 38.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is wet (c) it is magnetic (d) it is hot
39. 39.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
40. 40.🧺 Which of these is needed for the pendulum? (a) yeast (b) a heavy nut or washer (c) turmeric powder (d) a mirror

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