Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 386 · 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.🛟 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
2. 2.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
3. 3.⚖️ 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
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a battery cell (d) a pencil and tape
5. 5.🔮 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 doubles (d) it halves
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a balloon (d) a pencil and tape
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) how far we pull it back (c) time for 10 swings
8. 8.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
9. 9.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is wet (c) it is magnetic (d) it is hot
10. 10.⚖️ 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
11. 11.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
12. 12.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a string (c) turmeric powder (d) a magnet
13. 13.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
14. 14.⚖️ 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
15. 15.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 19 seconds?
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we keep it the same (c) we measure it
17. 17.⚖️ 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
18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) turmeric powder (d) a ruler
19. 19.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a magnet (c) a string (d) a ruler
20. 20.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) one swing is too slow (c) it is more accurate (d) 10 is a lucky number
21. 21.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) a balloon (c) a mirror (d) turmeric powder
22. 22.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
23. 23.True or false: a string is not needed for the pendulum. (a) False (b) True
24. 24.True or false: a ruler is not needed for the pendulum. (a) False (b) True
25. 25.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a balloon (c) a battery cell (d) a heavy nut or washer
26. 26.⚖️ 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
27. 27.True or false: a battery cell is needed for the pendulum. (a) False (b) True
28. 28.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
29. 29.⚖️ 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
30. 30.True or false: a balloon is not needed for the pendulum. (a) False (b) True
31. 31.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
32. 32.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) a mirror (d) a string
33. 33.⚖️ 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
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we keep it the same (c) we measure it
35. 35.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) it cannot swing (c) much slower (d) about the same
36. 36.True or false: a ruler is needed for the pendulum. (a) True (b) False
37. 37.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a grandfather clock (d) a phone
38. 38.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the string (c) the wind (d) magnetism
39. 39.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 51 seconds?
40. 40.⚖️ 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 string length (c) the weight of the bob (d) the same hook

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