Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 857 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a magnet (d) a pencil and tape
2. 2.⚖️ 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
3. 3.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) one swing is too slow (c) it is more accurate (d) 10 is a lucky number
4. 4.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) gravity (c) the wind (d) magnetism
5. 5.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
6. 6.🧺 Which of these is needed for the pendulum? (a) a ruler (b) a magnet (c) yeast (d) a balloon
7. 7.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) yeast (d) a stopwatch
8. 8.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) quicker (c) slower (d) stopped
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) the weight of the bob (c) the same hook (d) how far we pull it back
10. 10.True or false: a magnet is not needed for the pendulum. (a) False (b) True
11. 11.🔮 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 doubles (d) it halves
12. 12.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
13. 13.⚖️ 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) the string length (c) time for 10 swings
14. 14.⚖️ 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
15. 15.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
16. 16.⚖️ 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
17. 17.🛟 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
18. 18.🧺 Which of these is needed for the pendulum? (a) a magnet (b) turmeric powder (c) a string (d) yeast
19. 19.🧺 Which of these is not needed for the pendulum? (a) a string (b) a heavy nut or washer (c) a stopwatch (d) yeast
20. 20.True or false: a mirror is needed for the pendulum. (a) False (b) True
21. 21.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
22. 22.⚖️ 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
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a mirror (c) a pencil and tape (d) a ruler
24. 24.🧺 Which of these is not needed for the pendulum? (a) a string (b) a heavy nut or washer (c) a stopwatch (d) a magnet
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) yeast (c) a stopwatch (d) a ruler
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we change it (c) we keep it the same
27. 27.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a mirror (c) a battery cell (d) a balloon
28. 28.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
29. 29.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) much faster (d) about the same
30. 30.⚖️ 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
31. 31.⚖️ 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
32. 32.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) it is hot (d) the bob could hit you
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) True (b) False
34. 34.⚖️ 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
35. 35.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
36. 36.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much slower (c) yes, much faster (d) no, hardly at all
37. 37.True or false: a ruler is not needed for the pendulum. (a) True (b) False
38. 38.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
39. 39.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a heavier bob (d) a lighter bob
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) turmeric powder (d) a heavy nut or washer

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