Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 618 · 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? True or false: time for 10 swings is what we measure. (a) False (b) True
2. 2.⚖️ 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
3. 3.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) turmeric powder (d) a heavy nut or washer
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 same hook (c) how far we pull it back (d) the weight of the bob
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a mirror (c) a string (d) a ruler
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True
8. 8.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) about the same (c) much slower (d) it cannot swing
9. 9.⚖️ 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 keep it the same (c) we change it
10. 10.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
11. 11.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is hot (d) it is magnetic
12. 12.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) one swing is too slow (c) 10 is a lucky number (d) it is more fun
13. 13.🕰️ 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
14. 14.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
15. 15.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) heavier (d) stopped
16. 16.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 18 seconds?
17. 17.True or false: a battery cell is needed for the pendulum. (a) False (b) True
18. 18.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
19. 19.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a grandfather clock (d) a digital watch
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a heavy nut or washer (d) yeast
21. 21.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
22. 22.⚖️ 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) False (b) True
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.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
25. 25.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a ruler (c) a mirror (d) a balloon
26. 26.⚖️ 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 keep it the same (c) we change it
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a pencil and tape (c) a heavy nut or washer (d) a string
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) the same hook (c) how far we pull it back (d) the weight of the bob
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) True (b) False
30. 30.True or false: a string is needed for the pendulum. (a) False (b) True
31. 31.⚖️ 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) False (b) True
32. 32.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) gravity (c) the wind (d) magnetism
33. 33.True or false: yeast is needed for the pendulum. (a) True (b) False
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a battery cell (d) a pencil and tape
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a pencil and tape (d) a balloon
36. 36.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
37. 37.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) a mirror (d) a pencil and tape
38. 38.⚖️ 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
39. 39.🔮 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
40. 40.⚖️ 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

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