Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 631 · 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.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
2. 2.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a shorter string (d) a longer string
3. 3.True or false: a battery cell is needed for the pendulum. (a) True (b) False
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) the weight of the bob (c) how far we pull it back (d) time for 10 swings
5. 5.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
6. 6.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
7. 7.⚖️ 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
8. 8.⚖️ 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
9. 9.⚖️ 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) False (b) True
10. 10.⚖️ 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
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) the string length (c) time for 10 swings (d) how far we pull it back
12. 12.⚖️ 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 keep it the same (c) we change it
13. 13.True or false: yeast is needed for the pendulum. (a) False (b) True
14. 14.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) about the same (c) it cannot swing (d) much slower
15. 15.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) yes, much slower (c) it stops swinging (d) no, hardly at all
16. 16.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
17. 17.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
18. 18.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) the string (c) gravity (d) magnetism
19. 19.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
20. 20.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a stopwatch (c) a string (d) turmeric powder
21. 21.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a stopwatch (c) a magnet (d) a pencil and tape
22. 22.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a phone (c) a sundial (d) a grandfather clock
23. 23.⚖️ 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 change it (c) we measure it
24. 24.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) stopped (d) quicker
25. 25.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 30 seconds?
26. 26.⚖️ 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
27. 27.True or false: a mirror is not needed for the pendulum. (a) False (b) True
28. 28.⚖️ 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
29. 29.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 36 seconds?
30. 30.True or false: yeast is not needed for the pendulum. (a) True (b) False
31. 31.True or false: a ruler is not needed for the pendulum. (a) False (b) True
32. 32.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is magnetic (d) it is wet
33. 33.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it doubles (d) it becomes 4 times
34. 34.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
35. 35.True or false: a balloon is needed for the pendulum. (a) True (b) False
36. 36.⚖️ 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
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a mirror (d) a string
38. 38.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
39. 39.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?
40. 40.True or false: turmeric powder is needed for the pendulum. (a) False (b) True

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