Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 627 · 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.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
2. 2.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a magnet (c) yeast (d) a heavy nut or washer
3. 3.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) the bob could hit you (d) it is wet
4. 4.True or false: a string is needed for the pendulum. (a) False (b) True
5. 5.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a longer string (d) a shorter string
6. 6.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) quicker (d) heavier
7. 7.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the wind (c) the string (d) magnetism
8. 8.🔮 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
9. 9.⚖️ 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
10. 10.True or false: a ruler is not needed for the pendulum. (a) False (b) True
11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a pencil and tape (c) a string (d) a ruler
12. 12.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a glass bottle (d) a small nut or washer
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) yeast (c) a stopwatch (d) a heavy nut or washer
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we keep it the same (c) we change it
15. 15.True or false: yeast is needed for the pendulum. (a) False (b) True
16. 16.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
17. 17.⚖️ 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 change it (c) we measure it
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) the string length (c) time for 10 swings (d) how far we pull it back
19. 19.⚖️ 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
20. 20.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
21. 21.True or false: a magnet is needed for the pendulum. (a) True (b) False
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
23. 23.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
24. 24.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a balloon (c) a magnet (d) a ruler
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 weight of the bob (b) the string length (c) time for 10 swings
27. 27.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a heavy nut or washer (d) a battery cell
29. 29.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) no, hardly at all (c) yes, much faster (d) yes, much slower
30. 30.⚖️ 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
31. 31.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) turmeric powder (d) a stopwatch
32. 32.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a balloon (d) a pencil and tape
33. 33.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a digital watch (c) a sundial (d) a grandfather clock
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a mirror (d) a string
35. 35.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 10 seconds?
36. 36.⚖️ 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 same hook (d) the weight of the bob
37. 37.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) much faster (d) about the same
38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) False (b) True
39. 39.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
40. 40.⚖️ 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) False (b) True

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