Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 400 · 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 heavy nut or washer (b) a ruler (c) a string (d) turmeric powder
2. 2.True or false: a balloon is not needed for the pendulum. (a) True (b) False
3. 3.⚖️ 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
4. 4.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a stopwatch (d) a mirror
5. 5.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) it is wet (d) the bob could hit you
6. 6.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 28 seconds?
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a balloon (d) a string
8. 8.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) turmeric powder (d) a heavy nut or washer
9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a heavy nut or washer (c) a stopwatch (d) a string
10. 10.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
11. 11.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
12. 12.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) quicker (d) slower
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we change it (c) we measure it
14. 14.⚖️ 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
15. 15.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we keep it the same (c) we change it
17. 17.🧺 Which of these is needed for the pendulum? (a) yeast (b) turmeric powder (c) a pencil and tape (d) a balloon
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) how far we pull it back (c) time for 10 swings
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (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 halves (c) it doubles (d) it stays the same
21. 21.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) gravity (d) the wind
22. 22.True or false: a battery cell is needed for the pendulum. (a) False (b) True
23. 23.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a ruler (c) a battery cell (d) a string
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) True (b) False
25. 25.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
26. 26.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a grandfather clock (d) a phone
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a stopwatch (c) a ruler (d) a heavy nut or washer
28. 28.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 16 seconds?
29. 29.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 12 seconds?
30. 30.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
31. 31.True or false: a string is not needed for the pendulum. (a) True (b) False
32. 32.⚖️ 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 weight of the bob (c) the string length
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) time for 10 swings (c) the weight of the bob (d) how far we pull it back
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) False (b) True
35. 35.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a battery cell (d) a string
37. 37.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
38. 38.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a lighter bob (d) a shorter string
39. 39.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) a mirror (d) a heavy nut or washer

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