Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 391 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) turmeric powder (d) a string
2. 2.🔮 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
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a heavy nut or washer (c) a stopwatch (d) a ruler
4. 4.⚖️ 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 change it (c) we measure it
5. 5.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a grandfather clock (c) a phone (d) a digital watch
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a string (c) a stopwatch (d) a heavy nut or washer
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is the one thing we change. (a) True (b) False
8. 8.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
9. 9.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a heavy nut or washer (c) a pencil and tape (d) a ruler
10. 10.⚖️ 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
11. 11.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) one swing is too slow (c) 10 is a lucky number (d) it is more fun
12. 12.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is magnetic (d) it is hot
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 string length (c) the same hook
14. 14.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
15. 15.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
16. 16.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) quicker (d) slower
17. 17.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
18. 18.True or false: yeast is needed for the pendulum. (a) True (b) False
19. 19.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 19 seconds?
20. 20.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we measure it (c) we change it
22. 22.True or false: a balloon is not needed for the pendulum. (a) True (b) False
23. 23.⚖️ 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) time for 10 swings
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a balloon (d) a string
26. 26.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) it cannot swing (c) much faster (d) much slower
27. 27.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a sharp tool (d) a heavy brick
28. 28.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a shorter string (d) a longer string
29. 29.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 15 seconds?
30. 30.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
31. 31.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) a ruler (d) a battery cell
32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) time for 10 swings (c) the weight of the bob (d) the string length
33. 33.⚖️ 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
34. 34.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 42 seconds?
35. 35.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
36. 36.True or false: a battery cell is needed for the pendulum. (a) True (b) False
37. 37.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
38. 38.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) a magnet (d) a stopwatch
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) time for 10 swings (c) the string length
40. 40.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?

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