Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 10 · 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 pendulum takes 2 seconds for one swing. How many swings does it make in 36 seconds?
2. 2.⚖️ 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
3. 3.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
4. 4.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
5. 5.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) it cannot swing (d) much faster
6. 6.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
7. 7.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) yeast (d) a stopwatch
9. 9.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
10. 10.🕰️ 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
11. 11.⚖️ 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 change it (c) we keep it the same
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a battery cell (c) a ruler (d) a string
13. 13.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a balloon (c) a magnet (d) a ruler
14. 14.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
15. 15.🧺 Which of these is needed for the pendulum? (a) a magnet (b) yeast (c) a battery cell (d) a string
16. 16.⚖️ 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
17. 17.🛟 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
18. 18.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
19. 19.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is magnetic (d) it is wet
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) True (b) False
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) how far we pull it back (c) the string length (d) the weight of the bob
22. 22.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a magnet (c) a stopwatch (d) a mirror
23. 23.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 18 seconds?
24. 24.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
25. 25.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it doubles (c) it stays the same (d) it halves
26. 26.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a pencil and tape (c) a string (d) a magnet
27. 27.⚖️ 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
28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a magnet (d) a string
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
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) True (b) False
31. 31.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a grandfather clock (d) a phone
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a mirror (c) a heavy nut or washer (d) a stopwatch
33. 33.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 24 seconds?
34. 34.True or false: a battery cell is needed for the pendulum. (a) True (b) False
35. 35.⚖️ 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) False (b) True
36. 36.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a ruler (c) a heavy nut or washer (d) a pencil and tape
37. 37.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a stopwatch (c) a ruler (d) a pencil and tape
38. 38.True or false: a magnet is needed for the pendulum. (a) True (b) False
39. 39.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) gravity (c) magnetism (d) the string
40. 40.True or false: yeast is needed for the pendulum. (a) False (b) True

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