Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 405 · 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 pencil and tape (b) a heavy nut or washer (c) a stopwatch (d) a balloon
2. 2.⚖️ 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) False (b) True
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) a mirror (d) a ruler
4. 4.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a magnet (d) a string
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) False (b) True
6. 6.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much slower (c) it cannot swing (d) much faster
7. 7.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a shorter string (c) a lighter bob (d) a heavier bob
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) the same hook (c) the string length (d) how far we pull it back
9. 9.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) a balloon (d) a stopwatch
10. 10.🧺 Which of these is needed for the pendulum? (a) yeast (b) a magnet (c) a pencil and tape (d) a balloon
11. 11.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a small nut or washer (d) a heavy brick
12. 12.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a pencil and tape (c) a string (d) a heavy nut or washer
13. 13.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) the string (c) magnetism (d) gravity
14. 14.⚖️ 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
15. 15.⚖️ 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 measure it (c) we keep it the same
16. 16.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
17. 17.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more fun (c) 10 is a lucky number (d) it is more accurate
18. 18.🧺 Which of these is needed for the pendulum? (a) yeast (b) a string (c) a battery cell (d) turmeric powder
19. 19.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a magnet (c) a pencil and tape (d) a stopwatch
21. 21.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 54 seconds?
22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) yeast (d) a stopwatch
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) how far we pull it back (b) the string length (c) time for 10 swings (d) the weight of the bob
24. 24.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a grandfather clock (d) a phone
25. 25.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) it is hot (d) the bob could hit you
26. 26.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a mirror (c) a stopwatch (d) a string
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
28. 28.⚖️ 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
29. 29.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
30. 30.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
31. 31.True or false: yeast is needed for the pendulum. (a) False (b) True
32. 32.True or false: a balloon is needed for the pendulum. (a) False (b) True
33. 33.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it halves (d) it doubles
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we keep it the same (c) we measure it
35. 35.True or false: a balloon is not needed for the pendulum. (a) False (b) True
36. 36.True or false: a magnet is not needed for the pendulum. (a) True (b) False
37. 37.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) heavier (d) quicker
38. 38.True or false: a ruler is needed for the pendulum. (a) True (b) False
39. 39.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
40. 40.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?

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