Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 93 · 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.🧺 Which of these is not needed for the pendulum? (a) a string (b) turmeric powder (c) a ruler (d) a stopwatch
2. 2.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
3. 3.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
4. 4.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a phone (d) a sundial
5. 5.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) the wind (d) gravity
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a ruler (d) turmeric powder
7. 7.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a sharp tool (c) a glass bottle (d) a heavy brick
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) time for 10 swings (c) the weight of the bob (d) the same hook
9. 9.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) the bob could hit you (d) it is wet
10. 10.⚖️ 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
11. 11.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 12 seconds?
12. 12.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) heavier (d) slower
13. 13.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more accurate (c) 10 is a lucky number (d) it is more fun
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) how far we pull it back (c) the string length (d) the same hook
15. 15.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
16. 16.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
17. 17.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) yeast (c) a string (d) a heavy nut or washer
18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a pencil and tape (d) yeast
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) a string (d) a balloon
20. 20.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) turmeric powder (d) a heavy nut or washer
21. 21.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 9 seconds?
22. 22.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
23. 23.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
24. 24.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
25. 25.⚖️ 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
26. 26.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 19 seconds?
27. 27.⚖️ 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
28. 28.True or false: yeast is not needed for the pendulum. (a) False (b) True
29. 29.True or false: a balloon is not 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 same hook is the one thing we change. (a) False (b) True
31. 31.🔮 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
32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is kept the same. (a) True (b) False
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) False (b) True
35. 35.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
36. 36.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we keep it the same (c) we change it
38. 38.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a pencil and tape (c) turmeric powder (d) a magnet
39. 39.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) a ruler (d) turmeric powder
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a string (d) a mirror

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