Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 703 · 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.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) it cannot swing (c) about the same (d) much faster
2. 2.⚖️ 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 string length (d) the weight of the bob
3. 3.⚖️ 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
4. 4.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 27 seconds?
5. 5.🕰️ 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
6. 6.⚖️ 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
7. 7.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a small nut or washer (d) a glass bottle
8. 8.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) the wind (d) gravity
9. 9.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
10. 10.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a stopwatch (d) a battery cell
11. 11.⚖️ 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 measure it (c) we keep it the same
12. 12.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a shorter string (c) a heavier bob (d) a longer string
13. 13.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is kept the same. (a) False (b) True
15. 15.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a sundial (d) a phone
16. 16.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
17. 17.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) a balloon (d) a heavy nut or washer
18. 18.⚖️ 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
19. 19.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) turmeric powder (c) a mirror (d) a heavy nut or washer
20. 20.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
21. 21.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a stopwatch (c) a magnet (d) a heavy nut or washer
22. 22.True or false: a mirror is not needed for the pendulum. (a) True (b) False
23. 23.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
24. 24.🔮 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
25. 25.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) quicker (d) heavier
26. 26.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) a ruler (d) a mirror
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a battery cell (c) a pencil and tape (d) a stopwatch
28. 28.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) yeast (d) a heavy nut or washer
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a string (d) yeast
30. 30.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) 10 is a lucky number (c) one swing is too slow (d) it is more accurate
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) True (b) False
32. 32.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
33. 33.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) turmeric powder (c) a pencil and tape (d) a heavy nut or washer
34. 34.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a magnet (c) a pencil and tape (d) a heavy nut or washer
36. 36.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
37. 37.🧺 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) a mirror (d) a string
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a stopwatch (d) a balloon
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a heavy nut or washer (d) turmeric powder
40. 40.True or false: a string is needed for the pendulum. (a) True (b) False

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