Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 550 · 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.🧺 Which of these is needed for the pendulum? (a) a mirror (b) yeast (c) a magnet (d) a ruler
2. 2.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
3. 3.True or false: a mirror is needed for the pendulum. (a) False (b) True
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we measure it (c) we keep it the same
5. 5.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 34 seconds?
6. 6.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
7. 7.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) it stops swinging (c) yes, much slower (d) no, hardly at all
8. 8.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) about the same (d) it cannot swing
9. 9.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a battery cell (c) yeast (d) a magnet
10. 10.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
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 string length (c) how far we pull it back
12. 12.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) it is hot (d) the bob could hit you
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a pencil and tape (c) a stopwatch (d) a heavy nut or washer
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a stopwatch (d) a mirror
15. 15.True or false: a balloon is needed for the pendulum. (a) False (b) True
16. 16.⚖️ 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) how far we pull it back (c) the string length (d) the same hook
17. 17.⚖️ 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
18. 18.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
19. 19.🧺 Which of these is needed for the pendulum? (a) yeast (b) a mirror (c) turmeric powder (d) a stopwatch
20. 20.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a string (c) a stopwatch (d) a pencil and tape
21. 21.⚖️ 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
22. 22.⚖️ 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
23. 23.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a longer string (d) a lighter bob
24. 24.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a small nut or washer (d) a heavy brick
25. 25.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) magnetism (c) gravity (d) the string
26. 26.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) quicker (d) slower
27. 27.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
28. 28.⚖️ 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
29. 29.True or false: a string is not needed for the pendulum. (a) False (b) True
30. 30.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
31. 31.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a mirror (d) a pencil and tape
32. 32.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
33. 33.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it becomes 4 times (c) it stays the same (d) it halves
34. 34.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
35. 35.True or false: a balloon is not needed for the pendulum. (a) False (b) True
36. 36.True or false: a battery cell is needed for the pendulum. (a) False (b) True
37. 37.⚖️ 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
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 keep it the same (c) we change it
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a pencil and tape (c) a string (d) a ruler
40. 40.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True

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