Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 635 · 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.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
2. 2.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a heavier bob (c) a shorter string (d) a lighter bob
3. 3.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a heavy brick (d) a small nut or washer
4. 4.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) quicker (d) stopped
5. 5.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a pencil and tape (c) a heavy nut or washer (d) a balloon
6. 6.⚖️ 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) how far we pull it back (c) the string length
7. 7.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
8. 8.⚖️ 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) the same hook (c) how far we pull it back (d) the string length
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) the weight of the bob (c) time for 10 swings (d) the same hook
10. 10.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is magnetic (d) it is wet
11. 11.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
12. 12.🧺 Which of these is needed for the pendulum? (a) a ruler (b) a balloon (c) a mirror (d) a magnet
13. 13.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
14. 14.⚖️ 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 change it (c) we keep it the same
15. 15.True or false: a mirror is needed for the pendulum. (a) True (b) False
16. 16.⚖️ 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
17. 17.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
18. 18.⚖️ 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
19. 19.True or false: a magnet is needed for the pendulum. (a) True (b) False
20. 20.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it doubles (d) it halves
21. 21.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 17 seconds?
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) False (b) True
23. 23.⚖️ 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
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) the string length (c) time for 10 swings
25. 25.🕰️ 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
26. 26.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 27 seconds?
27. 27.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
28. 28.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 38 seconds?
29. 29.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
30. 30.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a string (c) a mirror (d) yeast
31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) a ruler (d) a battery cell
32. 32.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
33. 33.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
34. 34.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a magnet (d) a string
36. 36.True or false: a string is needed for the pendulum. (a) False (b) True
37. 37.True or false: a magnet is not needed for the pendulum. (a) True (b) False
38. 38.⚖️ 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 keep it the same (c) we measure it
39. 39.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a pencil and tape (c) turmeric powder (d) a ruler
40. 40.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more accurate (c) 10 is a lucky number (d) it is more fun

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