Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 562 · 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) one swing is too slow (c) it is more accurate (d) it is more fun
2. 2.⚖️ 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 keep it the same (b) we change it (c) we measure it
3. 3.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a balloon (c) a stopwatch (d) a mirror
4. 4.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) True (b) False
6. 6.⚖️ 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 weight of the bob (d) how far we pull it back
7. 7.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the string (c) magnetism (d) the wind
8. 8.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a pencil and tape (d) a magnet
9. 9.⚖️ 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) the same hook (c) the string length (d) time for 10 swings
10. 10.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a magnet (c) a balloon (d) a string
11. 11.🛟 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
12. 12.⚖️ 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 change it (c) we measure it
13. 13.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a balloon (c) yeast (d) a pencil and tape
14. 14.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
15. 15.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a stopwatch (d) turmeric powder
16. 16.True or false: a string is not needed for the pendulum. (a) False (b) True
17. 17.⚖️ 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) how far we pull it back (c) the string length
18. 18.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 12 seconds?
19. 19.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
20. 20.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 24 seconds?
21. 21.True or false: yeast is needed for the pendulum. (a) False (b) True
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) False (b) True
23. 23.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
24. 24.⚖️ 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) False (b) True
25. 25.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is the one thing we change. (a) False (b) True
27. 27.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 42 seconds?
28. 28.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a string (c) a ruler (d) a heavy nut or washer
30. 30.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
31. 31.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) quicker (c) stopped (d) slower
32. 32.🔮 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
33. 33.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 45 seconds?
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
35. 35.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we measure it (c) we change it
37. 37.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
38. 38.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a digital watch (d) a sundial
39. 39.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a ruler (c) a pencil and tape (d) a heavy nut or washer
40. 40.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a lighter bob (d) a longer string

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