Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 86 · 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 stopwatch is needed for the pendulum. (a) True (b) False
2. 2.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
3. 3.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a ruler (d) a balloon
5. 5.⚖️ 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
6. 6.⚖️ 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
7. 7.⚖️ 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
8. 8.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a small nut or washer (d) a glass bottle
9. 9.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a phone (d) a sundial
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) turmeric powder (c) a ruler (d) a pencil and tape
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.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much faster (c) yes, much slower (d) it stops swinging
13. 13.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 54 seconds?
14. 14.True or false: a string is not needed for the pendulum. (a) True (b) False
15. 15.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) a pencil and tape (d) a battery cell
16. 16.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a heavy nut or washer (c) a stopwatch (d) a string
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the same hook (b) the string length (c) how far we pull it back (d) time for 10 swings
18. 18.True or false: a balloon is not needed for the pendulum. (a) True (b) False
19. 19.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a stopwatch (c) a pencil and tape (d) a balloon
20. 20.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
21. 21.⚖️ 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
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 keep it the same (b) we change it (c) we measure it
23. 23.True or false: a mirror is needed for the pendulum. (a) True (b) False
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) the string length (c) time for 10 swings
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
26. 26.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
27. 27.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
28. 28.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
29. 29.⚖️ 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
30. 30.⚖️ 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 change it (c) we measure it
31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) yeast (d) a ruler
32. 32.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a heavier bob (d) a longer string
33. 33.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it doubles (d) it halves
34. 34.⚖️ 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
35. 35.⚖️ 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
36. 36.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
37. 37.True or false: a balloon is needed for the pendulum. (a) False (b) True
38. 38.True or false: a battery cell is needed for the pendulum. (a) False (b) True
39. 39.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
40. 40.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) turmeric powder (d) a heavy nut or washer

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