Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 530 · 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.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a small nut or washer (c) a glass bottle (d) a sharp tool
2. 2.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the wind (c) magnetism (d) the string
3. 3.⚖️ 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) time for 10 swings (c) the string length (d) how far we pull it back
4. 4.⚖️ 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
5. 5.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
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) False (b) True
7. 7.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
8. 8.True or false: a balloon is needed for the pendulum. (a) True (b) False
9. 9.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
10. 10.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
11. 11.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 13 seconds?
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a balloon (d) a heavy nut or washer
13. 13.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a battery cell (c) a string (d) a pencil and tape
14. 14.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much slower (c) much faster (d) it cannot swing
15. 15.True or false: yeast is not needed for the pendulum. (a) False (b) True
16. 16.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
17. 17.⚖️ 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
18. 18.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a mirror (c) a string (d) a pencil and tape
20. 20.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 12 seconds?
21. 21.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
22. 22.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) yeast (c) a stopwatch (d) a ruler
23. 23.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a pencil and tape (c) a stopwatch (d) a ruler
25. 25.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a magnet (c) a string (d) a battery cell
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 keep it the same (b) we measure it (c) we change it
27. 27.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much slower (c) yes, much faster (d) no, hardly at all
28. 28.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a longer string (c) a heavier bob (d) a shorter string
29. 29.⚖️ 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
30. 30.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) stopped (d) quicker
31. 31.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a battery cell (c) a mirror (d) a pencil and tape
32. 32.🔮 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 becomes 4 times (d) it doubles
33. 33.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a magnet (c) a ruler (d) a balloon
34. 34.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) it is magnetic (d) the bob could hit you
35. 35.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) a stopwatch (d) yeast
36. 36.⚖️ 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
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “how far we pull it back”? (a) we measure it (b) we keep it the same (c) we change it
38. 38.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
39. 39.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more fun (c) 10 is a lucky number (d) it is more accurate
40. 40.🧺 Do we need a string for the pendulum? (a) needed (b) not needed

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