Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 139 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a mirror (c) a pencil and tape (d) a stopwatch
2. 2.True or false: yeast is needed for the pendulum. (a) True (b) False
3. 3.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
4. 4.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) the weight of the bob (c) the string length (d) how far we pull it back
6. 6.⚖️ 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
7. 7.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
8. 8.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
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) how far we pull it back (c) time for 10 swings
10. 10.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
11. 11.⚖️ 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
12. 12.🛟 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
13. 13.True or false: a magnet is not needed for the pendulum. (a) True (b) False
14. 14.🧺 Which of these is needed for the pendulum? (a) a balloon (b) turmeric powder (c) a string (d) a magnet
15. 15.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
16. 16.⚖️ 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
17. 17.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
18. 18.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a sundial (c) a digital watch (d) a phone
19. 19.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it doubles (c) it stays the same (d) it halves
20. 20.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) about the same (d) much faster
21. 21.⚖️ 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 same hook (c) the string length
22. 22.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
23. 23.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a small nut or washer (d) a sharp tool
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a ruler (d) yeast
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) True (b) False
26. 26.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a pencil and tape (c) a battery cell (d) a heavy nut or washer
27. 27.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
28. 28.⚖️ 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
29. 29.⚖️ 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) the string length (c) time for 10 swings (d) the same hook
30. 30.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) the wind (d) gravity
31. 31.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) no, hardly at all (c) yes, much slower (d) yes, much faster
32. 32.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
33. 33.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a heavy nut or washer (d) turmeric powder
34. 34.🧺 Which of these is needed for the pendulum? (a) yeast (b) a mirror (c) a battery cell (d) a heavy nut or washer
35. 35.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a magnet (c) a ruler (d) a balloon
36. 36.⚖️ 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
37. 37.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) a stopwatch (d) a balloon
39. 39.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a string (c) a pencil and tape (d) a stopwatch
40. 40.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a battery cell (c) a balloon (d) a stopwatch

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