Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 792 · 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) yeast (b) turmeric powder (c) a battery cell (d) a ruler
2. 2.🕰️ A pendulum makes 10 swings in 10 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 the one thing we change? (a) time for 10 swings (b) the string length (c) how far we pull it back (d) the weight of the bob
4. 4.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a heavier bob (c) a shorter string (d) a lighter bob
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a stopwatch (d) turmeric powder
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the weight of the bob (c) time for 10 swings
7. 7.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) quicker (c) slower (d) stopped
8. 8.True or false: yeast is not needed for the pendulum. (a) False (b) True
9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a balloon (d) a stopwatch
10. 10.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 14 seconds?
11. 11.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a stopwatch (c) a string (d) a heavy nut or washer
12. 12.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
13. 13.🕰️ 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
14. 14.🧺 Which of these is needed for the pendulum? (a) a mirror (b) turmeric powder (c) a magnet (d) a stopwatch
15. 15.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
16. 16.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it halves (d) it doubles
17. 17.⚖️ 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 keep it the same (c) we change it
18. 18.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a sundial (d) a phone
19. 19.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
20. 20.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a heavy nut or washer (d) a battery cell
22. 22.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
23. 23.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 30 seconds?
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) False (b) True
25. 25.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) it is wet (d) the bob could hit you
26. 26.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
27. 27.⚖️ 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
28. 28.🧺 Which of these is needed for the pendulum? (a) a magnet (b) yeast (c) a mirror (d) a pencil and tape
29. 29.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a small nut or washer (d) a glass bottle
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we measure it (c) we keep it the same
31. 31.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
32. 32.True or false: yeast is needed for the pendulum. (a) True (b) False
33. 33.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) turmeric powder (c) a ruler (d) a stopwatch
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a pencil and tape (c) a stopwatch (d) a string
35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) the string length (c) the same hook
36. 36.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
37. 37.⚖️ 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 measure it (c) we change it
38. 38.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
39. 39.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 7 seconds?
40. 40.⚖️ 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) True (b) False

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