Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 169 · 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.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a heavy nut or washer (c) a balloon (d) a mirror
2. 2.⚖️ 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 same hook (c) the string length (d) time for 10 swings
3. 3.True or false: yeast is needed for the pendulum. (a) False (b) True
4. 4.⚖️ 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
5. 5.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
6. 6.⚖️ 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 measure it (c) we change it
7. 7.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
8. 8.🕰️ 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
9. 9.⚖️ 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
10. 10.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it stays the same (c) it doubles (d) it becomes 4 times
11. 11.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a pencil and tape (d) yeast
12. 12.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
13. 13.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a sharp tool (d) a small nut or washer
14. 14.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the string (d) the wind
15. 15.⚖️ 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
16. 16.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a mirror (d) a pencil and tape
17. 17.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
18. 18.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 24 seconds?
19. 19.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) quicker (d) slower
20. 20.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
21. 21.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
22. 22.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
23. 23.True or false: a balloon is needed for the pendulum. (a) False (b) True
24. 24.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we change it (c) we keep it the same
26. 26.⚖️ 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
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a pencil and tape (c) turmeric powder (d) a ruler
28. 28.⚖️ 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
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a battery cell (d) a heavy nut or washer
30. 30.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is wet (c) it is hot (d) it is magnetic
31. 31.🧺 Which of these is needed for the pendulum? (a) a balloon (b) yeast (c) a magnet (d) a string
32. 32.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 45 seconds?
33. 33.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a magnet (c) a pencil and tape (d) a balloon
34. 34.⚖️ 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
35. 35.⚖️ 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
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) True (b) False
37. 37.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
38. 38.⚖️ 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
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a ruler (c) a pencil and tape (d) a string
40. 40.True or false: a mirror is needed for the pendulum. (a) False (b) True

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