Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 661 · 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 should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is magnetic (c) it is wet (d) it is hot
2. 2.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
3. 3.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 42 seconds?
4. 4.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a magnet (d) a stopwatch
5. 5.⚖️ 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
6. 6.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
7. 7.⚖️ 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
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) False (b) True
9. 9.True or false: a balloon is not needed for the pendulum. (a) True (b) False
10. 10.⚖️ 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 keep it the same (c) we change it
11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a magnet (d) a heavy nut or washer
12. 12.⚖️ 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 same hook
13. 13.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
14. 14.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
15. 15.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it doubles (d) it stays the same
16. 16.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
17. 17.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a pencil and tape (c) a heavy nut or washer (d) a string
18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a balloon (c) a pencil and tape (d) a ruler
19. 19.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 6 seconds?
20. 20.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a phone (c) a sundial (d) a grandfather clock
21. 21.🧺 Which of these is needed for the pendulum? (a) a string (b) a balloon (c) yeast (d) a magnet
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we keep it the same (c) we measure it
23. 23.⚖️ 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
24. 24.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
25. 25.⚖️ 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
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) the same hook (c) the string length (d) how far we pull it back
27. 27.🧺 Do we need a magnet for the pendulum? (a) needed (b) not 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.⚖️ 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) how far we pull it back
30. 30.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) False (b) True
32. 32.⚖️ 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
33. 33.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
34. 34.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a string (c) a heavy nut or washer (d) a ruler
36. 36.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a mirror (c) a heavy nut or washer (d) a string
37. 37.True or false: yeast is not needed for the pendulum. (a) False (b) True
38. 38.🕰️ 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
39. 39.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
40. 40.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a battery cell (c) a balloon (d) yeast

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