Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 312 · 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 ruler (c) a string (d) turmeric powder
2. 2.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
3. 3.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) gravity (d) the wind
4. 4.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) quicker (d) heavier
5. 5.⚖️ 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 same hook (c) the string length
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) time for 10 swings (c) the string length
8. 8.True or false: a string is needed for the pendulum. (a) False (b) True
9. 9.⚖️ 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
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) a stopwatch (d) a magnet
11. 11.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) yes, much faster (c) it stops swinging (d) no, hardly at all
12. 12.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
13. 13.⚖️ 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
14. 14.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
15. 15.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a balloon (c) a pencil and tape (d) a heavy nut or washer
16. 16.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a phone (d) a grandfather clock
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) the weight of the bob (c) the same hook (d) the string length
18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a mirror (c) a heavy nut or washer (d) a stopwatch
19. 19.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) about the same (c) much faster (d) much slower
20. 20.⚖️ 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
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a heavy nut or washer (d) a battery cell
22. 22.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it stays the same (c) it halves (d) it becomes 4 times
23. 23.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
24. 24.⚖️ 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 measure it (b) we change it (c) we keep it the same
25. 25.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
26. 26.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a small nut or washer (c) a heavy brick (d) a sharp tool
27. 27.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 6 seconds?
28. 28.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) a battery cell (c) a mirror (d) yeast
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) True (b) False
30. 30.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is magnetic (d) it is hot
31. 31.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a pencil and tape (c) a ruler (d) a stopwatch
32. 32.⚖️ 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
33. 33.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
34. 34.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
35. 35.⚖️ 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 weight of the bob (c) the same hook (d) time for 10 swings
36. 36.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
37. 37.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a string (c) a battery cell (d) a mirror
38. 38.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
39. 39.⚖️ 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
40. 40.⚖️ 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

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