Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 234 · 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.True or false: yeast is not needed for the pendulum. (a) False (b) True
2. 2.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is wet (d) it is hot
3. 3.🔮 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 halves (d) it stays the same
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a balloon (c) a pencil and tape (d) a ruler
5. 5.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) quicker (d) heavier
6. 6.True or false: a mirror is needed for the pendulum. (a) True (b) False
7. 7.⚖️ 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
8. 8.True or false: a ruler is not needed for the pendulum. (a) True (b) False
9. 9.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a heavy brick (c) a glass bottle (d) a sharp tool
10. 10.⚖️ 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) True (b) False
11. 11.⚖️ 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 weight of the bob (c) the string length
12. 12.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
13. 13.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) one swing is too slow (c) it is more accurate (d) it is more fun
14. 14.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) it cannot swing (c) about the same (d) much slower
15. 15.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a balloon (c) a ruler (d) a string
16. 16.True or false: yeast is needed for the pendulum. (a) False (b) True
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we change it (c) we measure it
18. 18.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
19. 19.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the same hook (c) time for 10 swings
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a string (c) a pencil and tape (d) a stopwatch
22. 22.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the wind (d) the string
23. 23.⚖️ 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 same hook (c) the string length (d) time for 10 swings
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) False (b) True
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a stopwatch (c) a ruler (d) a pencil and tape
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we measure it (c) we keep it the same
27. 27.🕰️ 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
28. 28.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a magnet (c) a heavy nut or washer (d) yeast
29. 29.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
30. 30.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a pencil and tape (c) a string (d) a magnet
32. 32.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a battery cell (c) a balloon (d) a stopwatch
33. 33.True or false: a string is not needed for the pendulum. (a) False (b) True
34. 34.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 27 seconds?
35. 35.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 20 seconds?
36. 36.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 28 seconds?
37. 37.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
38. 38.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a grandfather clock (c) a phone (d) a digital watch
39. 39.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
40. 40.⚖️ 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

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