Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 158 · 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.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) stopped (d) heavier
2. 2.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a string (c) a battery cell (d) yeast
3. 3.🧺 Which of these is needed for the pendulum? (a) yeast (b) a heavy nut or washer (c) a magnet (d) turmeric powder
4. 4.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a small nut or washer (c) a glass bottle (d) a sharp tool
5. 5.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a battery cell (c) a ruler (d) a balloon
6. 6.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
7. 7.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) the string (c) gravity (d) magnetism
8. 8.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 10 seconds?
9. 9.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
10. 10.⚖️ 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
11. 11.⚖️ 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
12. 12.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) a pencil and tape (d) yeast
13. 13.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) it is magnetic (d) the bob could hit you
14. 14.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we measure it (c) we keep it the same
16. 16.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
17. 17.⚖️ 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 same hook (c) the string length
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) the string length (c) the same hook (d) time for 10 swings
19. 19.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
20. 20.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
21. 21.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 9 seconds?
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
23. 23.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) turmeric powder (d) a stopwatch
24. 24.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a longer string (d) a lighter bob
25. 25.True or false: a balloon is needed for the pendulum. (a) False (b) True
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) how far we pull it back (c) the weight of the bob (d) the string length
27. 27.⚖️ 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
28. 28.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
29. 29.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) turmeric powder (d) a pencil and tape
30. 30.⚖️ 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
31. 31.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
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 string length (c) the weight of the bob
33. 33.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) it is more accurate (c) 10 is a lucky number (d) one swing is too slow
34. 34.True or false: a balloon is not needed for the pendulum. (a) False (b) True
35. 35.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it becomes 4 times (d) it stays the same
36. 36.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) a pencil and tape (d) a battery cell
37. 37.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
38. 38.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a grandfather clock (d) a phone
39. 39.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) turmeric powder (c) yeast (d) a battery cell
40. 40.🧺 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) a ruler (d) a magnet

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