Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 26 · 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 makes 20 swings in 20 seconds. How many seconds does one swing take?
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.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
4. 4.⚖️ 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) False (b) True
5. 5.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 6 seconds?
6. 6.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a heavy brick (d) a sharp tool
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a heavy nut or washer (d) turmeric powder
8. 8.🕰️ 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
9. 9.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a phone (c) a sundial (d) a grandfather clock
10. 10.⚖️ 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 change it (c) we measure it
11. 11.True or false: a string is not needed for the pendulum. (a) True (b) False
12. 12.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
13. 13.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is hot (d) it is wet
14. 14.🧺 Which of these is needed for the pendulum? (a) a balloon (b) yeast (c) a battery cell (d) a string
15. 15.🧺 Which of these is needed for the pendulum? (a) a magnet (b) yeast (c) a stopwatch (d) a balloon
16. 16.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) a balloon (d) a heavy nut or washer
17. 17.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we keep it the same (c) we measure it
19. 19.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the wind (c) gravity (d) the string
20. 20.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it becomes 4 times (d) it stays the same
21. 21.True or false: a balloon is needed for the pendulum. (a) False (b) True
22. 22.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
23. 23.🧺 Which of these is needed for the pendulum? (a) yeast (b) a battery cell (c) a magnet (d) a pencil and tape
24. 24.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
25. 25.⚖️ 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
26. 26.⚖️ 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) the string length (c) how far we pull it back (d) time for 10 swings
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a mirror (d) a heavy nut or washer
28. 28.🧺 Which of these is needed for the pendulum? (a) a ruler (b) a battery cell (c) a magnet (d) a mirror
29. 29.True or false: a string is needed for the pendulum. (a) False (b) True
30. 30.⚖️ 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
31. 31.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) yeast (d) a heavy nut or washer
32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) False (b) True
33. 33.⚖️ 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) False (b) True
34. 34.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a pencil and tape (d) a balloon
35. 35.⚖️ 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
36. 36.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 12 seconds?
37. 37.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) quicker (d) heavier
38. 38.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) about the same (d) it cannot swing
39. 39.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?
40. 40.⚖️ 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

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