Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 882 · 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.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 30 seconds?
2. 2.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a string (c) a balloon (d) turmeric powder
3. 3.True or false: a balloon is not needed for the pendulum. (a) True (b) False
4. 4.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 42 seconds?
5. 5.⚖️ 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
6. 6.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a sundial (d) a digital watch
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) the string length (c) the same hook (d) time for 10 swings
8. 8.⚖️ 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
9. 9.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 36 seconds?
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) the string length (c) time for 10 swings
11. 11.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
12. 12.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a magnet (c) a heavy nut or washer (d) a string
14. 14.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
15. 15.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
16. 16.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a glass bottle (d) a small nut or washer
17. 17.⚖️ 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 keep it the same (c) we measure it
18. 18.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) slower (d) quicker
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a mirror (c) a string (d) a heavy nut or washer
20. 20.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
21. 21.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
22. 22.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a heavy nut or washer (d) a magnet
23. 23.⚖️ 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
24. 24.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a longer string (d) a lighter bob
25. 25.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) a heavy nut or washer (d) turmeric powder
26. 26.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) it is wet (d) the bob could hit you
27. 27.🕰️ 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
28. 28.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
29. 29.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
30. 30.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 8 seconds?
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) True (b) False
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a pencil and tape (d) a balloon
33. 33.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
34. 34.⚖️ 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) False (b) True
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a heavy nut or washer (c) a pencil and tape (d) a ruler
36. 36.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) much faster (d) about the same
37. 37.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a magnet (c) a heavy nut or washer (d) a battery cell
38. 38.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
39. 39.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) yes, much slower (c) no, hardly at all (d) it stops swinging
40. 40.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed

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