Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 151 · 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.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a glass bottle (d) a heavy brick
2. 2.⚖️ 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
3. 3.⚖️ 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) time for 10 swings (c) the string length (d) how far we pull it back
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) a heavy nut or washer (d) a battery cell
5. 5.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
6. 6.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a pencil and tape (c) a ruler (d) a string
7. 7.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) the bob could hit you (d) it is magnetic
8. 8.🔮 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
9. 9.🧺 Which of these is not needed for the pendulum? (a) a string (b) a battery cell (c) a pencil and tape (d) a heavy nut or washer
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we keep it the same (c) we measure it
11. 11.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
12. 12.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) quicker (c) stopped (d) slower
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) how far we pull it back (c) time for 10 swings
14. 14.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
15. 15.True or false: a mirror is needed for the pendulum. (a) True (b) False
16. 16.⚖️ 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) False (b) True
17. 17.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
18. 18.⚖️ 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
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a stopwatch (c) a ruler (d) a string
20. 20.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a balloon (c) a heavy nut or washer (d) a battery cell
21. 21.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a grandfather clock (d) a phone
22. 22.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
23. 23.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) False (b) True
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) a string (d) a mirror
26. 26.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
27. 27.⚖️ 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
28. 28.True or false: a balloon is needed for the pendulum. (a) False (b) True
29. 29.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) about the same (c) much faster (d) much slower
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) time for 10 swings (c) how far we pull it back (d) the weight of the bob
31. 31.⚖️ 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) True (b) False
32. 32.⚖️ 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
33. 33.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
34. 34.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a stopwatch (c) a pencil and tape (d) a magnet
35. 35.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) it stops swinging (c) yes, much slower (d) no, hardly at all
36. 36.🧺 Which of these is needed for the pendulum? (a) yeast (b) a battery cell (c) a pencil and tape (d) a magnet
37. 37.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 39 seconds?
38. 38.True or false: a string is not needed for the pendulum. (a) False (b) True
39. 39.🧺 Which of these is needed for the pendulum? (a) yeast (b) a string (c) a battery cell (d) a magnet
40. 40.⚖️ 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

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