Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 555 · 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.⚖️ 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 weight of the bob
2. 2.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) False (b) True
4. 4.⚖️ 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
5. 5.⚖️ 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) the same hook
6. 6.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) much faster (c) it cannot swing (d) about the same
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) True (b) False
8. 8.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 24 seconds?
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the weight of the bob (c) time for 10 swings
10. 10.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) magnetism (c) the wind (d) the string
11. 11.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) a balloon (d) a stopwatch
12. 12.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
13. 13.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
14. 14.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a pencil and tape (c) yeast (d) a battery cell
15. 15.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a phone (c) a grandfather clock (d) a sundial
16. 16.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 17 seconds?
17. 17.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) slower (d) quicker
18. 18.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
19. 19.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
20. 20.⚖️ 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
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we keep it the same (c) we measure it
22. 22.⚖️ 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
23. 23.🧺 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 heavy nut or washer
24. 24.🧺 Which of these is needed for the pendulum? (a) a mirror (b) yeast (c) a ruler (d) a battery cell
25. 25.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
26. 26.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a glass bottle (d) a small nut or washer
27. 27.True or false: a ruler is not needed for the pendulum. (a) False (b) True
28. 28.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a heavy nut or washer (c) a balloon (d) a battery cell
29. 29.⚖️ 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 change it (c) we keep it the same
30. 30.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
31. 31.⚖️ 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
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) yeast (d) a heavy nut or washer
33. 33.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
34. 34.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is hot (c) it is magnetic (d) the bob could hit you
35. 35.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a stopwatch (d) a balloon
37. 37.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it becomes 4 times (c) it stays the same (d) it halves
38. 38.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
39. 39.⚖️ 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
40. 40.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?

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