Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 20 · 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.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) yes, much faster (c) it stops swinging (d) no, hardly at all
2. 2.⚖️ 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) the weight of the bob (d) the same hook
3. 3.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it halves (c) it doubles (d) it stays the same
4. 4.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
5. 5.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 20 seconds?
6. 6.⚖️ 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) how far we pull it back
7. 7.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) it is wet (d) the bob could hit you
8. 8.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
9. 9.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a battery cell (c) a stopwatch (d) a string
11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a stopwatch (c) a heavy nut or washer (d) a ruler
12. 12.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a small nut or washer (d) a sharp tool
13. 13.True or false: a string is needed for the pendulum. (a) True (b) False
14. 14.🧺 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 balloon
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
16. 16.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) turmeric powder (d) a stopwatch
17. 17.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
18. 18.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a grandfather clock (d) a phone
19. 19.⚖️ 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
20. 20.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
21. 21.🧺 Which of these is needed for the pendulum? (a) a balloon (b) turmeric powder (c) a ruler (d) a magnet
22. 22.⚖️ 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) how far we pull it back (d) the weight of the bob
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 change it (b) we keep it the same (c) we measure it
24. 24.🔮 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
25. 25.True or false: a mirror is not needed for the pendulum. (a) False (b) True
26. 26.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 34 seconds?
27. 27.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
28. 28.True or false: a battery cell is needed for the pendulum. (a) False (b) True
29. 29.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
30. 30.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
31. 31.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 26 seconds?
32. 32.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) yeast (d) a stopwatch
33. 33.⚖️ 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 weight of the bob
34. 34.⚖️ 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
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a pencil and tape (c) a stopwatch (d) a string
36. 36.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 10 seconds?
37. 37.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a shorter string (d) a lighter bob
38. 38.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) magnetism (c) the string (d) gravity
39. 39.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a mirror (c) a stopwatch (d) a ruler

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