Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 755 · 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 balloon (b) a heavy nut or washer (c) a pencil and tape (d) a stopwatch
2. 2.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a glass bottle (d) a heavy brick
3. 3.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
4. 4.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it becomes 4 times (d) it stays the same
5. 5.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
6. 6.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 14 seconds?
7. 7.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a sundial (c) a digital watch (d) a phone
8. 8.True or false: a ruler is not needed for the pendulum. (a) False (b) True
9. 9.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) stopped (d) heavier
10. 10.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) no, hardly at all (c) yes, much faster (d) it stops swinging
11. 11.⚖️ 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
12. 12.⚖️ 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) True (b) False
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) how far we pull it back (c) time for 10 swings (d) the weight of the bob
14. 14.⚖️ 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 weight of the bob (c) the string length (d) the same hook
15. 15.⚖️ 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) False (b) True
16. 16.True or false: yeast is not needed for the pendulum. (a) False (b) True
17. 17.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) the bob could hit you (d) it is magnetic
18. 18.True or false: yeast is needed for the pendulum. (a) True (b) False
19. 19.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a string (c) a pencil and tape (d) a ruler
20. 20.⚖️ 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
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
22. 22.⚖️ 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
23. 23.⚖️ 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
24. 24.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
25. 25.⚖️ 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) the same hook
26. 26.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
27. 27.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
28. 28.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
29. 29.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
30. 30.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
31. 31.⚖️ 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
32. 32.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 19 seconds?
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) False (b) True
34. 34.🧺 Which of these is needed for the pendulum? (a) yeast (b) turmeric powder (c) a magnet (d) a ruler
35. 35.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a magnet (c) a string (d) a battery cell
36. 36.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
37. 37.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
38. 38.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
39. 39.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 20 seconds?
40. 40.⚖️ 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

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