Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 125 · 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? What do we do with “the same hook”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.True or false: yeast is needed for the pendulum. (a) False (b) True
3. 3.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a heavy nut or washer (c) a stopwatch (d) a string
5. 5.⚖️ 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) time for 10 swings (c) the string length (d) the weight of the bob
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) False (b) True
7. 7.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
8. 8.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a glass bottle (d) a small nut or washer
9. 9.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
10. 10.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
11. 11.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) quicker (d) heavier
12. 12.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) yeast (c) turmeric powder (d) a mirror
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a battery cell (c) a pencil and tape (d) a heavy nut or washer
14. 14.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
15. 15.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
16. 16.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a pencil and tape (d) a balloon
18. 18.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
19. 19.⚖️ 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 same hook (c) the string length
20. 20.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the wind (d) the string
21. 21.🛟 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
22. 22.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a longer string (d) a lighter bob
23. 23.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
24. 24.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) a battery cell (d) a stopwatch
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) time for 10 swings (c) the weight of the bob (d) the string length
26. 26.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
27. 27.⚖️ 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
28. 28.⚖️ 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
29. 29.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
30. 30.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a battery cell (c) turmeric powder (d) a ruler
31. 31.⚖️ 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
32. 32.⚖️ 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
33. 33.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much faster (c) yes, much slower (d) it stops swinging
34. 34.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a string (c) a battery cell (d) a mirror
35. 35.True or false: a magnet is not needed for the pendulum. (a) False (b) True
36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) True (b) False
37. 37.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it doubles (d) it becomes 4 times
38. 38.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is the one thing we change. (a) False (b) True
40. 40.⚖️ 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 change it (b) we measure it (c) we keep it the same

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