Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 864 · 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.True or false: a mirror is not needed for the pendulum. (a) False (b) True
2. 2.⚖️ 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) how far we pull it back (c) the string length (d) the same hook
3. 3.🧺 Which of these is not needed for the pendulum? (a) a string (b) a magnet (c) a heavy nut or washer (d) a ruler
4. 4.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a shorter string (d) a lighter bob
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) the weight of the bob (c) the string length (d) time for 10 swings
6. 6.True or false: yeast is needed for the pendulum. (a) False (b) True
7. 7.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
8. 8.True or false: a ruler is not needed for the pendulum. (a) True (b) False
9. 9.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
10. 10.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) about the same (d) much faster
11. 11.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is wet (d) it is magnetic
12. 12.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a heavy brick (d) a small nut or washer
13. 13.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a phone (c) a digital watch (d) a sundial
14. 14.True or false: a balloon is not needed for the pendulum. (a) False (b) True
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 stays the same (d) it doubles
16. 16.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) quicker (d) heavier
17. 17.True or false: a ruler is needed for the pendulum. (a) True (b) False
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we measure it (c) we keep it the same
19. 19.⚖️ 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
20. 20.⚖️ 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
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a heavy nut or washer (d) yeast
22. 22.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
23. 23.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 24 seconds?
24. 24.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
25. 25.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) time for 10 swings (c) the string length
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a stopwatch (c) a string (d) a ruler
28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) a magnet (d) a string
29. 29.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
30. 30.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
31. 31.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
32. 32.⚖️ 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 measure it (c) we keep it the same
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a pencil and tape (d) a battery cell
34. 34.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
35. 35.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
36. 36.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
37. 37.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much slower (c) yes, much faster (d) no, hardly at all
38. 38.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a battery cell (d) a string
39. 39.⚖️ 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 change it (b) we keep it the same (c) we measure it
40. 40.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) turmeric powder (c) a balloon (d) a mirror

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