Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 557 · 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.True or false: a balloon is needed for the pendulum. (a) False (b) True
2. 2.⚖️ 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 change it (c) we keep it the same
3. 3.🧺 Which of these is needed for the pendulum? (a) a ruler (b) a battery cell (c) a mirror (d) a balloon
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) False (b) True
5. 5.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 18 seconds?
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) the weight of the bob (c) the same hook (d) the string length
7. 7.⚖️ 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
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a magnet (d) a ruler
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) time for 10 swings (c) the string length
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a heavy nut or washer (d) a mirror
11. 11.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) stopped (d) heavier
12. 12.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 9 seconds?
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 fun (c) 10 is a lucky number (d) it is more accurate
14. 14.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a pencil and tape (c) a magnet (d) yeast
15. 15.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
16. 16.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
17. 17.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
18. 18.⚖️ 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
19. 19.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a pencil and tape (c) a ruler (d) a heavy nut or washer
20. 20.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) about the same (c) much slower (d) it cannot swing
21. 21.⚖️ 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
22. 22.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
23. 23.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) yeast (c) a stopwatch (d) a mirror
24. 24.True or false: a string is not needed for the pendulum. (a) False (b) True
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 keep it the same (b) we measure it (c) we change it
26. 26.⚖️ 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
27. 27.True or false: a balloon is not needed for the pendulum. (a) True (b) False
28. 28.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a stopwatch (c) a ruler (d) a heavy nut or washer
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) the same hook (c) time for 10 swings (d) the weight of the bob
30. 30.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) the wind (d) gravity
31. 31.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 17 seconds?
32. 32.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
33. 33.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a stopwatch (c) a pencil and tape (d) a string
35. 35.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
36. 36.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
37. 37.🧺 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) a balloon
38. 38.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) it is hot (d) the bob could hit you
39. 39.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it stays the same (c) it becomes 4 times (d) it doubles
40. 40.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a sharp tool (d) a small nut or washer

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