Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 474 · 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.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) it is wet (d) the bob could hit you
2. 2.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a lighter bob (c) a heavier bob (d) a shorter string
3. 3.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) stopped (d) quicker
4. 4.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a pencil and tape (c) a heavy nut or washer (d) a ruler
5. 5.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the wind (c) magnetism (d) the string
6. 6.⚖️ 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 keep it the same (c) we measure it
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.🔮 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? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) how far we pull it back
10. 10.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) how far we pull it back (c) time for 10 swings (d) the string length
12. 12.True or false: a battery cell is needed for the pendulum. (a) True (b) False
13. 13.True or false: a mirror is needed for the pendulum. (a) False (b) True
14. 14.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
15. 15.🧺 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 heavy nut or washer
16. 16.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it stays the same (d) it becomes 4 times
17. 17.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a small nut or washer (d) a glass bottle
18. 18.⚖️ 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
19. 19.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a mirror (c) yeast (d) a string
20. 20.⚖️ 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
21. 21.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a heavy nut or washer (c) a magnet (d) yeast
22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) yeast (d) a pencil and tape
23. 23.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a battery cell (c) a pencil and tape (d) a balloon
24. 24.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
25. 25.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much faster (c) it stops swinging (d) yes, much slower
26. 26.True or false: yeast is needed for the pendulum. (a) True (b) False
27. 27.True or false: a magnet is not needed for the pendulum. (a) False (b) True
28. 28.True or false: a balloon is not needed for the pendulum. (a) True (b) False
29. 29.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 39 seconds?
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) False (b) True
31. 31.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
32. 32.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
33. 33.⚖️ 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 string length (c) the weight of the bob
34. 34.⚖️ 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
35. 35.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 33 seconds?
36. 36.True or false: a balloon is needed for the pendulum. (a) True (b) False
37. 37.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a stopwatch (c) a string (d) a ruler
38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we change it (c) we keep it the same
39. 39.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
40. 40.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?

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