Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 752 · 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? Which of these is what we measure? (a) the string length (b) the weight of the bob (c) how far we pull it back (d) time for 10 swings
2. 2.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) quicker (d) slower
3. 3.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a mirror (d) a pencil and tape
5. 5.🛟 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
6. 6.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
7. 7.True or false: a magnet is needed for the pendulum. (a) True (b) False
8. 8.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it stays the same (d) it becomes 4 times
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we measure it (c) we change it
10. 10.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the same hook (b) how far we pull it back (c) the weight of the bob (d) the string length
12. 12.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
13. 13.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
14. 14.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) yeast (c) a string (d) a heavy nut or washer
16. 16.True or false: yeast is needed for the pendulum. (a) True (b) False
17. 17.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is magnetic (d) it is wet
18. 18.⚖️ 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
19. 19.True or false: a string is not needed for the pendulum. (a) False (b) True
20. 20.⚖️ 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
21. 21.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 12 seconds?
22. 22.🧺 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 ruler
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is the one thing we change. (a) False (b) True
24. 24.⚖️ 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) True (b) False
25. 25.⚖️ 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) time for 10 swings (c) the string length
26. 26.⚖️ 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) True (b) False
27. 27.🧺 Which of these is needed for the pendulum? (a) a magnet (b) yeast (c) a stopwatch (d) a balloon
28. 28.True or false: a string is needed for the pendulum. (a) True (b) False
29. 29.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) yes, much slower (c) it stops swinging (d) no, hardly at all
30. 30.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
31. 31.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) much faster (d) it cannot swing
32. 32.⚖️ 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 keep it the same (b) we change it (c) we measure it
33. 33.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) turmeric powder (c) a heavy nut or washer (d) a mirror
34. 34.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a grandfather clock (d) a phone
35. 35.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) it is more fun (c) 10 is a lucky number (d) one swing is too slow
36. 36.True or false: a battery cell is needed for the pendulum. (a) True (b) False
37. 37.⚖️ 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 keep it the same (c) we measure it
38. 38.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 20 seconds?
39. 39.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a ruler (c) a battery cell (d) yeast
40. 40.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 54 seconds?

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