Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 653 · 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 turmeric powder for the pendulum? (a) not needed (b) needed
2. 2.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
3. 3.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much faster (c) it cannot swing (d) much slower
4. 4.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a digital watch (d) a grandfather clock
5. 5.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
6. 6.🛟 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
7. 7.True or false: a magnet is not needed for the pendulum. (a) False (b) True
8. 8.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) the wind (c) gravity (d) magnetism
9. 9.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) yes, much faster (c) it stops swinging (d) no, hardly at all
10. 10.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
12. 12.🛟 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
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) False (b) True
14. 14.⚖️ 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
15. 15.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a mirror (c) a magnet (d) a ruler
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.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) time for 10 swings (c) the string length (d) the same hook
18. 18.⚖️ 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
19. 19.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
20. 20.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a longer string (d) a lighter bob
21. 21.⚖️ 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) how far we pull it back (c) time for 10 swings (d) the same hook
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.⚖️ 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
24. 24.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it stays the same (c) it doubles (d) it becomes 4 times
25. 25.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
26. 26.⚖️ 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
27. 27.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
28. 28.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
29. 29.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a heavy nut or washer (c) turmeric powder (d) a balloon
30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a heavy nut or washer (d) a balloon
31. 31.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
32. 32.⚖️ 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) True (b) False
33. 33.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
34. 34.⚖️ 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
35. 35.True or false: yeast is needed for the pendulum. (a) False (b) True
36. 36.True or false: a mirror is needed for the pendulum. (a) False (b) True
37. 37.🧺 Which of these is not needed for the pendulum? (a) a string (b) a stopwatch (c) turmeric powder (d) a ruler
38. 38.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) turmeric powder (c) a string (d) a stopwatch
40. 40.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 28 seconds?

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