Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 105 · 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? True or false: the string length is kept the same. (a) True (b) False
2. 2.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is magnetic (d) it is wet
3. 3.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
4. 4.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a magnet (c) yeast (d) a stopwatch
5. 5.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
6. 6.⚖️ 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
7. 7.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) a pencil and tape (d) turmeric powder
8. 8.True or false: a string is not needed for the pendulum. (a) True (b) False
9. 9.True or false: a ruler is not needed for the pendulum. (a) False (b) True
10. 10.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) a stopwatch (d) a balloon
11. 11.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the wind (d) the string
12. 12.True or false: a magnet is needed for the pendulum. (a) True (b) False
13. 13.⚖️ 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 measure it (c) we keep it the same
14. 14.⚖️ 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
15. 15.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a sharp tool (d) a heavy brick
16. 16.True or false: a balloon is needed for the pendulum. (a) False (b) True
17. 17.⚖️ 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
18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a battery cell (d) a string
19. 19.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a longer string (d) a lighter bob
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a mirror (c) a stopwatch (d) a ruler
21. 21.⚖️ 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
22. 22.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a grandfather clock (c) a digital watch (d) a phone
23. 23.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
24. 24.⚖️ 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
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) how far we pull it back (c) the same hook (d) the weight of the bob
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a ruler (d) a balloon
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) the string length (c) time for 10 swings (d) the same hook
28. 28.⚖️ 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
29. 29.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a pencil and tape (c) a battery cell (d) a heavy nut or washer
30. 30.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
31. 31.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
32. 32.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
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) True (b) False
34. 34.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) heavier (d) stopped
35. 35.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
36. 36.True or false: a string is needed for the pendulum. (a) False (b) True
37. 37.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
38. 38.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
39. 39.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a string (c) a battery cell (d) a magnet
40. 40.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True

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