Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 452 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a pencil and tape (d) a magnet
2. 2.⚖️ 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 measure it (c) we keep it the same
3. 3.True or false: a mirror is not needed for the pendulum. (a) True (b) False
4. 4.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 15 seconds?
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) how far we pull it back (c) the string length (d) the same hook
7. 7.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
8. 8.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is wet (c) it is magnetic (d) it is hot
9. 9.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a heavy nut or washer (c) a string (d) a stopwatch
10. 10.🧺 Which of these is needed for the pendulum? (a) a mirror (b) yeast (c) turmeric powder (d) a ruler
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.⚖️ 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) True (b) False
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 measure it (b) we keep it the same (c) we change it
14. 14.⚖️ 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) the weight of the bob
15. 15.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) stopped (d) heavier
16. 16.⚖️ 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) False (b) True
17. 17.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
18. 18.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a small nut or washer (c) a sharp tool (d) a glass bottle
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) a string (d) yeast
20. 20.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) a balloon (d) a string
21. 21.🧺 Which of these is needed for the pendulum? (a) a string (b) yeast (c) a battery cell (d) a magnet
22. 22.🧺 Which of these is needed for the pendulum? (a) yeast (b) a heavy nut or washer (c) a battery cell (d) a magnet
23. 23.True or false: a magnet is not needed for the pendulum. (a) False (b) True
24. 24.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
25. 25.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 20 seconds?
26. 26.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) gravity (c) the wind (d) magnetism
27. 27.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
28. 28.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
29. 29.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
30. 30.⚖️ 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 keep it the same (b) we change it (c) we measure it
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) time for 10 swings (c) the string length
32. 32.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
33. 33.⚖️ 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
34. 34.🔮 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
35. 35.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a longer string (d) a shorter string
36. 36.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
37. 37.⚖️ 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) False (b) True
38. 38.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
39. 39.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) no, hardly at all (c) yes, much slower (d) yes, much faster
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a stopwatch (d) a balloon

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