Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 836 · 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.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it halves (d) it doubles
2. 2.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) the bob could hit you (d) it is hot
3. 3.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a heavy nut or washer (c) a ruler (d) a string
4. 4.🧺 Which of these is needed for the pendulum? (a) a magnet (b) turmeric powder (c) a heavy nut or washer (d) a mirror
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a stopwatch (d) a magnet
6. 6.⚖️ 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) True (b) False
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we change it (c) we keep it the same
8. 8.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) heavier (d) quicker
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we measure it (c) we change it
10. 10.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) a mirror (c) a battery cell (d) a magnet
11. 11.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
12. 12.True or false: a battery cell is needed for the pendulum. (a) False (b) True
13. 13.⚖️ 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 measure it (c) we change it
14. 14.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) a string (d) a battery cell
15. 15.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
16. 16.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
17. 17.⚖️ 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
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is the one thing we change. (a) True (b) False
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) time for 10 swings (c) how far we pull it back (d) the weight of the bob
20. 20.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
22. 22.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a heavy brick (d) a glass bottle
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
24. 24.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
25. 25.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 19 seconds?
26. 26.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
27. 27.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a stopwatch (c) a balloon (d) a string
28. 28.🔮 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
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a battery cell (d) a pencil and tape
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) False (b) True
31. 31.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) magnetism (c) the wind (d) the string
32. 32.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
33. 33.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a lighter bob (d) a heavier bob
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a string (d) yeast
35. 35.⚖️ 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 change it (b) we measure it (c) we keep it the same
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a mirror (d) a ruler
37. 37.True or false: a mirror is needed for the pendulum. (a) True (b) False
38. 38.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
39. 39.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
40. 40.True or false: a magnet is not needed for the pendulum. (a) True (b) False

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