Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 766 · 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.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much faster (c) much slower (d) it cannot swing
2. 2.⚖️ 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 keep it the same (c) we measure it
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a pencil and tape (c) a heavy nut or washer (d) a ruler
4. 4.🔮 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
5. 5.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a sharp tool (c) a heavy brick (d) a glass bottle
6. 6.🛟 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
7. 7.⚖️ 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
8. 8.🧺 Which of these is not needed for the pendulum? (a) a string (b) a stopwatch (c) a ruler (d) a battery cell
9. 9.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
10. 10.⚖️ 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) False (b) True
11. 11.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a shorter string (c) a longer string (d) a heavier bob
12. 12.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
13. 13.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) it is more fun (c) 10 is a lucky number (d) one swing is too slow
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a ruler (c) a string (d) a heavy nut or washer
15. 15.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a pencil and tape (d) turmeric powder
16. 16.⚖️ 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
17. 17.True or false: a mirror is needed for the pendulum. (a) False (b) True
18. 18.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 51 seconds?
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we keep it the same (c) we change it
20. 20.⚖️ 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
21. 21.True or false: a ruler is needed for the pendulum. (a) False (b) True
22. 22.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
23. 23.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
24. 24.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a digital watch (c) a sundial (d) a grandfather clock
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) False (b) True
26. 26.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
27. 27.⚖️ 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 weight of the bob
28. 28.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
29. 29.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) gravity (c) magnetism (d) the string
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 measure it (b) we keep it the same (c) we change it
31. 31.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 42 seconds?
32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we measure it (c) we keep it the same
33. 33.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) yes, much slower (c) it stops swinging (d) no, hardly at all
34. 34.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
35. 35.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
36. 36.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) a ruler (d) a magnet
37. 37.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) yeast (c) a mirror (d) a string
38. 38.⚖️ 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 string length (d) how far we pull it back
39. 39.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
40. 40.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed

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