Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 567 · 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.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.⚖️ 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
3. 3.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
4. 4.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
5. 5.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 10 seconds?
6. 6.🕰️ 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
7. 7.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) yeast (c) a balloon (d) a ruler
8. 8.⚖️ 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
9. 9.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) the string (c) gravity (d) magnetism
10. 10.True or false: a ruler is not needed for the pendulum. (a) False (b) True
11. 11.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a string (c) yeast (d) a battery cell
12. 12.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 30 seconds?
13. 13.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
14. 14.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) quicker (d) stopped
15. 15.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a small nut or washer (d) a glass bottle
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True
17. 17.🧺 Which of these is needed for the pendulum? (a) a magnet (b) turmeric powder (c) a heavy nut or washer (d) a battery cell
18. 18.⚖️ 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) how far we pull it back (c) the same hook (d) the weight of the bob
19. 19.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
20. 20.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
21. 21.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
22. 22.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) about the same (c) much slower (d) much faster
23. 23.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a longer string (c) a shorter string (d) a heavier bob
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) False (b) True
25. 25.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 12 seconds?
26. 26.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
27. 27.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is magnetic (c) it is hot (d) it is wet
28. 28.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) time for 10 swings (c) how far we pull it back (d) the weight of the bob
30. 30.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much slower (c) yes, much faster (d) it stops swinging
31. 31.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 24 seconds?
32. 32.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
33. 33.⚖️ 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
34. 34.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a stopwatch (d) a mirror
36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) False (b) True
37. 37.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it becomes 4 times (d) it doubles
38. 38.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
39. 39.⚖️ 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
40. 40.⚖️ 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

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