Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 408 · 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 mirror is needed for the pendulum. (a) True (b) False
2. 2.True or false: a string is needed for the pendulum. (a) False (b) True
3. 3.⚖️ 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
4. 4.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a sharp tool (d) a heavy brick
5. 5.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
6. 6.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it doubles (c) it halves (d) it stays the same
7. 7.⚖️ 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
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a mirror (d) a stopwatch
9. 9.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) quicker (d) slower
10. 10.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
11. 11.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) a balloon (d) a ruler
12. 12.🛟 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
13. 13.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
14. 14.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
15. 15.⚖️ 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
16. 16.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a phone (c) a grandfather clock (d) a sundial
17. 17.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) time for 10 swings (c) how far we pull it back (d) the string length
19. 19.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
20. 20.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
21. 21.🧺 Which of these is needed for the pendulum? (a) yeast (b) a stopwatch (c) turmeric powder (d) a magnet
22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a heavy nut or washer (d) a magnet
23. 23.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a pencil and tape (c) a balloon (d) turmeric powder
24. 24.⚖️ 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 keep it the same (b) we measure it (c) we change it
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a ruler (d) a balloon
26. 26.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a ruler (c) a stopwatch (d) a pencil and tape
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we change it (c) we keep it the same
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the same hook (b) the weight of the bob (c) time for 10 swings (d) the string length
30. 30.True or false: a ruler is not needed for the pendulum. (a) False (b) True
31. 31.⚖️ 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
32. 32.⚖️ 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
33. 33.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) a string (d) a balloon
34. 34.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 22 seconds?
35. 35.⚖️ 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
36. 36.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) gravity (c) magnetism (d) the string
37. 37.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) one swing is too slow (c) it is more accurate (d) it is more fun
38. 38.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
39. 39.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) turmeric powder (d) a pencil and tape

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