Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 826 · 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.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) the bob could hit you (d) it is wet
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the weight of the bob
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a string (c) a ruler (d) a pencil and tape
4. 4.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a ruler (c) a magnet (d) a balloon
5. 5.🔮 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
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.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a heavy brick (d) a small nut or washer
8. 8.⚖️ 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 change it (c) we keep it the same
9. 9.🧺 Which of these is not needed for the pendulum? (a) a string (b) a mirror (c) a ruler (d) a heavy nut or washer
10. 10.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 15 seconds?
11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a pencil and tape (c) a string (d) a heavy nut or washer
12. 12.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it halves (d) it doubles
13. 13.⚖️ 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
14. 14.🕰️ 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
15. 15.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the string (d) the wind
16. 16.⚖️ 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
17. 17.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a shorter string (d) a longer string
18. 18.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
19. 19.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 28 seconds?
20. 20.⚖️ 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
21. 21.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a stopwatch (c) a string (d) a pencil and tape
23. 23.⚖️ 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 measure it (b) we change it (c) we keep it the same
24. 24.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) heavier (c) stopped (d) slower
25. 25.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a magnet (d) a heavy nut or washer
27. 27.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
28. 28.⚖️ 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) time for 10 swings (d) the weight of the bob
29. 29.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a phone (c) a sundial (d) a grandfather clock
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) the same hook (c) time for 10 swings (d) how far we pull it back
31. 31.True or false: a magnet is needed for the pendulum. (a) True (b) False
32. 32.True or false: a string is needed for the pendulum. (a) True (b) False
33. 33.True or false: a string is not needed for the pendulum. (a) False (b) True
34. 34.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
35. 35.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 9 seconds?
36. 36.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 14 seconds?
37. 37.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 42 seconds?
38. 38.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?
39. 39.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) a pencil and tape (d) a magnet
40. 40.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a magnet (c) turmeric powder (d) a string

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