Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 300 · 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 do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more fun (c) one swing is too slow (d) it is more accurate
2. 2.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) about the same (d) much faster
3. 3.🔮 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
4. 4.True or false: a magnet is needed for the pendulum. (a) True (b) False
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) time for 10 swings (c) the same hook (d) how far we pull it back
6. 6.⚖️ 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) False (b) True
7. 7.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a heavy nut or washer (c) a string (d) a stopwatch
9. 9.⚖️ 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
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a ruler (d) a balloon
11. 11.⚖️ 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
12. 12.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 45 seconds?
13. 13.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is wet (d) it is hot
14. 14.⚖️ 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 measure it (c) we keep it the same
15. 15.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
16. 16.True or false: a ruler is not needed for the pendulum. (a) True (b) False
17. 17.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a pencil and tape (c) a string (d) a magnet
19. 19.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
20. 20.True or false: a string is not needed for the pendulum. (a) True (b) False
21. 21.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a small nut or washer (c) a sharp tool (d) a heavy brick
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we measure it (c) we change it
23. 23.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
24. 24.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a pencil and tape (d) a balloon
25. 25.True or false: a string is needed for the pendulum. (a) True (b) False
26. 26.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
27. 27.🧺 Which of these is needed for the pendulum? (a) a magnet (b) turmeric powder (c) yeast (d) a heavy nut or washer
28. 28.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
29. 29.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) gravity (c) the wind (d) magnetism
30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) yeast (c) a ruler (d) a stopwatch
31. 31.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
32. 32.True or false: a battery cell is needed for the pendulum. (a) True (b) False
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a string (c) a pencil and tape (d) a heavy nut or washer
34. 34.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 57 seconds?
35. 35.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 36 seconds?
36. 36.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) a magnet (d) a stopwatch
37. 37.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) it stops swinging (c) yes, much slower (d) no, hardly at all
38. 38.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
39. 39.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a heavy nut or washer (c) a ruler (d) a pencil and tape
40. 40.🧺 Do we need a string for the pendulum? (a) not needed (b) needed

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