Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 468 · 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.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is hot (c) it is magnetic (d) the bob could hit you
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 string length (c) time for 10 swings (d) the same hook
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the weight of the bob
4. 4.🧺 Which of these is needed for the pendulum? (a) a string (b) a mirror (c) a battery cell (d) a magnet
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we measure it (c) we keep it the same
6. 6.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
7. 7.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) heavier (d) stopped
8. 8.⚖️ 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 keep it the same (c) we measure it
9. 9.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it becomes 4 times (c) it stays the same (d) it halves
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
11. 11.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) 10 is a lucky number (c) one swing is too slow (d) it is more accurate
12. 12.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the string (d) the wind
13. 13.🧺 Which of these is not needed for the pendulum? (a) a string (b) a stopwatch (c) a magnet (d) a heavy nut or washer
14. 14.True or false: a magnet is needed for the pendulum. (a) False (b) True
15. 15.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) turmeric powder (c) a heavy nut or washer (d) a ruler
16. 16.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) a pencil and tape (d) yeast
17. 17.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a heavy nut or washer (d) turmeric powder
19. 19.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a grandfather clock (d) a digital watch
20. 20.⚖️ 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) time for 10 swings (c) the same hook (d) the string length
21. 21.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 38 seconds?
22. 22.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
23. 23.⚖️ 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
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) yeast (c) a stopwatch (d) a heavy nut or washer
25. 25.🧺 Which of these is needed for the pendulum? (a) a magnet (b) yeast (c) a heavy nut or washer (d) a mirror
26. 26.⚖️ 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
27. 27.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
28. 28.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
29. 29.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a heavy brick (d) a sharp tool
30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a balloon (d) a stopwatch
31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) a stopwatch (d) a battery cell
32. 32.🧺 Which of these is needed for the pendulum? (a) a ruler (b) a magnet (c) a mirror (d) turmeric powder
33. 33.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
34. 34.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
35. 35.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 12 seconds?
36. 36.True or false: a ruler is not needed for the pendulum. (a) False (b) True
37. 37.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?
38. 38.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
39. 39.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
40. 40.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 24 seconds?

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