Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 595 · 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 stopwatch (c) a balloon (d) a string
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) how far we pull it back (b) the string length (c) the weight of the bob (d) the same hook
3. 3.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a small nut or washer (c) a heavy brick (d) a sharp tool
4. 4.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) heavier (d) quicker
5. 5.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
6. 6.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
7. 7.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a phone (c) a sundial (d) a grandfather clock
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) a magnet (d) a heavy nut or washer
9. 9.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a heavier bob (d) a longer string
10. 10.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 28 seconds?
11. 11.⚖️ 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) True (b) False
12. 12.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is hot (d) it is magnetic
13. 13.True or false: a mirror is not needed for the pendulum. (a) True (b) False
14. 14.🕰️ 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
15. 15.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
17. 17.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it stays the same (c) it becomes 4 times (d) it halves
18. 18.True or false: a balloon is not needed for the pendulum. (a) True (b) False
19. 19.True or false: a balloon is needed for the pendulum. (a) True (b) False
20. 20.True or false: a battery cell is needed for the pendulum. (a) False (b) True
21. 21.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
22. 22.⚖️ 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 weight of the bob (c) the string length
23. 23.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a balloon (c) a battery cell (d) a string
24. 24.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) a battery cell (d) a ruler
25. 25.⚖️ 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
26. 26.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 7 seconds?
27. 27.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 24 seconds?
28. 28.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) turmeric powder (c) a string (d) a ruler
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we keep it the same (c) we change it
30. 30.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
31. 31.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
32. 32.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
33. 33.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a pencil and tape (c) a magnet (d) yeast
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) False (b) True
35. 35.⚖️ 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) True (b) False
36. 36.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a string (c) a ruler (d) a pencil and tape
37. 37.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 16 seconds?
38. 38.⚖️ 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
39. 39.⚖️ 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
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) yeast (d) a string

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