Simple Pendulum Experiment Worksheet

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

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