Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 303 · 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: the weight of the bob is kept the same. (a) True (b) False
2. 2.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
3. 3.⚖️ 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) how far we pull it back
4. 4.⚖️ 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
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a balloon (d) a ruler
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a ruler (c) a stopwatch (d) a string
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we keep it the same (c) we change it
8. 8.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a battery cell (c) a balloon (d) a heavy nut or washer
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) how far we pull it back (b) the same hook (c) the string length (d) the weight of the bob
10. 10.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it halves (c) it doubles (d) it stays the same
11. 11.🛟 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
12. 12.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we measure it (c) we change it
14. 14.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 16 seconds?
15. 15.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) the wind (d) gravity
16. 16.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
17. 17.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) yeast (c) a string (d) a stopwatch
18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a heavy nut or washer (d) a magnet
19. 19.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
20. 20.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) quicker (d) slower
21. 21.⚖️ 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
22. 22.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a pencil and tape (d) a balloon
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) the string length (c) time for 10 swings (d) how far we pull it back
24. 24.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
25. 25.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
26. 26.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a digital watch (c) a grandfather clock (d) a sundial
27. 27.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a ruler (c) yeast (d) a balloon
28. 28.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a magnet (d) a stopwatch
29. 29.True or false: yeast is not needed for the pendulum. (a) False (b) True
30. 30.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
31. 31.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
32. 32.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) turmeric powder (c) a string (d) a heavy nut or washer
34. 34.True or false: a battery cell is needed for the pendulum. (a) False (b) True
35. 35.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 24 seconds?
36. 36.⚖️ 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
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we keep it the same (c) we measure it
38. 38.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 36 seconds?
39. 39.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a small nut or washer (c) a heavy brick (d) a sharp tool
40. 40.True or false: a string is needed for the pendulum. (a) True (b) False

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