Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 461 · 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? What do we do with “the string length”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.🧺 Which of these is needed for the pendulum? (a) a string (b) turmeric powder (c) yeast (d) a mirror
3. 3.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) yeast (d) a heavy nut or washer
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we change it (c) we keep it the same
5. 5.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a phone (d) a grandfather clock
6. 6.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 51 seconds?
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
8. 8.True or false: a mirror is not needed for the pendulum. (a) False (b) True
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) time for 10 swings (c) the weight of the bob (d) the string length
10. 10.True or false: yeast is not needed for the pendulum. (a) True (b) False
11. 11.⚖️ 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
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) turmeric powder (d) a pencil and tape
13. 13.True or false: a string is not needed for the pendulum. (a) False (b) True
14. 14.⚖️ 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
15. 15.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) the bob could hit you (d) it is hot
16. 16.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
17. 17.⚖️ 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) the string length (c) the same hook (d) how far we pull it back
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) the string length (c) the same hook
19. 19.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) a battery cell (d) a pencil and tape
20. 20.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) it stops swinging (c) yes, much faster (d) no, hardly at all
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a pencil and tape (c) a heavy nut or washer (d) a ruler
22. 22.🧺 Which of these is needed for the pendulum? (a) yeast (b) a magnet (c) a balloon (d) a stopwatch
23. 23.True or false: a mirror is needed for the pendulum. (a) True (b) False
24. 24.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) gravity (c) magnetism (d) the wind
25. 25.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 8 seconds?
26. 26.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
27. 27.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
28. 28.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
29. 29.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
30. 30.⚖️ 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
31. 31.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
32. 32.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
33. 33.🔮 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
34. 34.True or false: a magnet is not needed for the pendulum. (a) False (b) True
35. 35.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a small nut or washer (d) a heavy brick
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a balloon (c) a pencil and tape (d) a string
37. 37.🔮 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 halves (d) it becomes 4 times
38. 38.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
39. 39.⚖️ 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) False (b) True
40. 40.True or false: a stopwatch is needed for the pendulum. (a) False (b) True

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