Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 733 · 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.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
2. 2.🧺 Which of these is needed for the pendulum? (a) yeast (b) a ruler (c) a mirror (d) turmeric powder
3. 3.⚖️ 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 keep it the same (c) we measure it
4. 4.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
5. 5.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
6. 6.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
7. 7.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a grandfather clock (d) a digital watch
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 pencil and tape (d) yeast
9. 9.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) the string length (c) how far we pull it back (d) time for 10 swings
11. 11.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
12. 12.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) it is magnetic (d) the bob could hit you
13. 13.⚖️ 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 same hook (c) the string length
14. 14.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 22 seconds?
15. 15.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
16. 16.🧺 Which of these is needed for the pendulum? (a) yeast (b) a mirror (c) a balloon (d) a heavy nut or washer
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) how far we pull it back (c) time for 10 swings (d) the string length
18. 18.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 24 seconds?
19. 19.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) 10 is a lucky number (c) one swing is too slow (d) it is more accurate
20. 20.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it becomes 4 times (d) it doubles
21. 21.⚖️ 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) True (b) False
22. 22.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a magnet (c) a stopwatch (d) a heavy nut or washer
23. 23.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a shorter string (d) a longer string
24. 24.⚖️ 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
25. 25.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a heavy nut or washer (d) a balloon
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a stopwatch (d) a battery cell
27. 27.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
28. 28.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) magnetism (c) the string (d) gravity
29. 29.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) turmeric powder (d) a heavy nut or washer
31. 31.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a battery cell (c) a heavy nut or washer (d) a stopwatch
32. 32.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a small nut or washer (d) a heavy brick
33. 33.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
34. 34.True or false: a ruler is not needed for the pendulum. (a) False (b) True
35. 35.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) heavier (d) stopped
36. 36.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
37. 37.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a battery cell (c) a string (d) turmeric powder
38. 38.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a ruler (c) a heavy nut or washer (d) a string
39. 39.🔮 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
40. 40.⚖️ 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

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