Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 464 · 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? What do we do with “the string length”? (a) we measure it (b) we keep it the same (c) we change it
2. 2.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a magnet (c) a ruler (d) a string
3. 3.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) quicker (d) slower
4. 4.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a string (d) a battery cell
6. 6.⚖️ 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
7. 7.⚖️ 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 same hook (c) how far we pull it back (d) time for 10 swings
8. 8.⚖️ 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
9. 9.⚖️ 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) the string length (c) time for 10 swings
10. 10.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
11. 11.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
12. 12.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
13. 13.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) a balloon (c) a battery cell (d) yeast
14. 14.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a longer string (d) a lighter bob
15. 15.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a string (c) turmeric powder (d) a balloon
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a pencil and tape (d) a balloon
17. 17.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 10 seconds?
18. 18.🔮 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
19. 19.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a balloon (c) a string (d) a stopwatch
20. 20.⚖️ 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
21. 21.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
22. 22.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a battery cell (c) a stopwatch (d) a pencil and tape
23. 23.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a sundial (d) a phone
24. 24.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
25. 25.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a stopwatch (c) a heavy nut or washer (d) yeast
26. 26.⚖️ 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) True (b) False
27. 27.True or false: a ruler is not needed for the pendulum. (a) False (b) True
28. 28.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) the bob could hit you (d) it is magnetic
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a heavy nut or washer (c) a pencil and tape (d) a stopwatch
30. 30.⚖️ 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) True (b) False
31. 31.🛟 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
32. 32.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) 10 is a lucky number (c) it is more fun (d) it is more accurate
33. 33.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 24 seconds?
34. 34.🔮 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
35. 35.True or false: a mirror is needed for the pendulum. (a) False (b) True
36. 36.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
37. 37.True or false: a balloon is needed for the pendulum. (a) True (b) False
38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we keep it the same (c) we measure it
39. 39.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) the wind (c) gravity (d) magnetism
40. 40.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?

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