Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 794 · 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 not needed for the pendulum? (a) a heavy nut or washer (b) a magnet (c) a ruler (d) a string
2. 2.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a string (d) a battery cell
3. 3.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a small nut or washer (c) a sharp tool (d) a glass bottle
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the weight of the bob (c) time for 10 swings
5. 5.True or false: a mirror is needed for the pendulum. (a) True (b) False
6. 6.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a balloon (c) a pencil and tape (d) a ruler
7. 7.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
8. 8.True or false: a balloon is not needed for the pendulum. (a) False (b) True
9. 9.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 19 seconds?
10. 10.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) heavier (d) stopped
11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a mirror (d) a ruler
12. 12.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is hot (d) it is magnetic
13. 13.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
14. 14.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a lighter bob (d) a longer string
15. 15.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it doubles (d) it halves
16. 16.⚖️ 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
17. 17.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
18. 18.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 24 seconds?
19. 19.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 34 seconds?
20. 20.⚖️ 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) True (b) False
21. 21.⚖️ 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 keep it the same (c) we change it
22. 22.🕰️ 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 fun (d) it is more accurate
23. 23.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a ruler (c) a stopwatch (d) a pencil and tape
25. 25.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) the weight of the bob (c) how far we pull it back (d) the string length
27. 27.⚖️ 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
28. 28.⚖️ 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
29. 29.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) yeast (c) a string (d) a stopwatch
30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a balloon (c) a string (d) a stopwatch
31. 31.True or false: a balloon is needed for the pendulum. (a) False (b) True
32. 32.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
33. 33.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
34. 34.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is kept the same. (a) True (b) False
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) yeast (d) a string
37. 37.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a battery cell (c) turmeric powder (d) a balloon
38. 38.True or false: a ruler is not needed for the pendulum. (a) True (b) False
39. 39.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
40. 40.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) magnetism (c) the string (d) gravity

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