Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 594 · 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.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) how far we pull it back (c) time for 10 swings (d) the weight of the bob
2. 2.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the wind (c) the string (d) gravity
3. 3.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a shorter string (d) a lighter bob
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
5. 5.🧺 Which of these is needed for the pendulum? (a) a magnet (b) turmeric powder (c) a ruler (d) a balloon
6. 6.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) about the same (d) much slower
7. 7.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
8. 8.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) slower (d) quicker
9. 9.⚖️ 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 keep it the same (b) we change it (c) we measure it
10. 10.True or false: a mirror is 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 halves (b) it doubles (c) it becomes 4 times (d) it stays the same
12. 12.⚖️ 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 weight of the bob (c) how far we pull it back (d) the string length
13. 13.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is wet (c) it is hot (d) it is magnetic
14. 14.🧺 Which of these is needed for the pendulum? (a) a string (b) a magnet (c) a battery cell (d) yeast
15. 15.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) True (b) False
17. 17.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
18. 18.⚖️ 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
19. 19.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a heavy brick (d) a small nut or washer
20. 20.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a balloon (c) a magnet (d) a mirror
21. 21.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
22. 22.🕰️ 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
23. 23.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a digital watch (c) a grandfather clock (d) a sundial
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) yeast (c) a string (d) a heavy nut or washer
25. 25.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
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 keep it the same (b) we measure it (c) we change it
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the weight of the bob
28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a balloon (c) a pencil and tape (d) a ruler
29. 29.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
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 heavy nut or washer (b) a balloon (c) a pencil and tape (d) a ruler
32. 32.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a heavy nut or washer (c) a ruler (d) a string
33. 33.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
34. 34.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a battery cell (d) a heavy nut or washer
35. 35.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
36. 36.⚖️ 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
37. 37.⚖️ 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
38. 38.True or false: a battery cell is needed for the pendulum. (a) False (b) True
39. 39.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 33 seconds?
40. 40.True or false: a battery cell is not needed for the pendulum. (a) True (b) False

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