Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 351 · 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.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) the bob could hit you (d) it is hot
2. 2.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
3. 3.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) much faster (d) it cannot swing
4. 4.🛟 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
5. 5.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a mirror (c) a balloon (d) a battery cell
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) the string length (c) time for 10 swings (d) the weight of the bob
7. 7.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a heavy nut or washer (c) a battery cell (d) a magnet
8. 8.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
9. 9.⚖️ 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
10. 10.True or false: yeast is needed for the pendulum. (a) False (b) True
11. 11.⚖️ 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
12. 12.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
13. 13.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) magnetism (c) the string (d) the wind
14. 14.⚖️ 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 measure it (c) we change it
15. 15.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) slower (d) quicker
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) yeast (d) a stopwatch
17. 17.True or false: a magnet is not needed for the pendulum. (a) False (b) True
18. 18.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
19. 19.True or false: a ruler is not needed for the pendulum. (a) True (b) False
20. 20.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a magnet (c) a string (d) turmeric powder
21. 21.⚖️ 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
22. 22.⚖️ 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 measure it (c) we keep it the same
23. 23.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
24. 24.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a longer string (c) a heavier bob (d) a shorter string
25. 25.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
26. 26.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
27. 27.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it stays the same (c) it doubles (d) it becomes 4 times
28. 28.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) no, hardly at all (c) it stops swinging (d) yes, much slower
29. 29.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) 10 is a lucky number (c) one swing is too slow (d) it is more accurate
30. 30.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a pencil and tape (c) a string (d) a stopwatch
31. 31.⚖️ 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
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a stopwatch (c) a ruler (d) a string
33. 33.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
34. 34.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
35. 35.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
36. 36.True or false: a balloon is needed for the pendulum. (a) True (b) False
37. 37.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a balloon (c) a heavy nut or washer (d) a string
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) the string length (c) how far we pull it back (d) time for 10 swings
40. 40.True or false: a battery cell is not needed for the pendulum. (a) True (b) False

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