Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 751 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) yeast (c) a pencil and tape (d) a string
2. 2.True or false: a mirror is needed for the pendulum. (a) True (b) False
3. 3.⚖️ 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 measure it (c) we change it
4. 4.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
6. 6.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a heavy nut or washer (c) a pencil and tape (d) a ruler
7. 7.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
8. 8.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
9. 9.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) it cannot swing (c) much faster (d) much slower
10. 10.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
11. 11.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is hot (d) it is wet
12. 12.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 12 seconds?
13. 13.⚖️ 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
14. 14.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a sharp tool (d) a small nut or washer
15. 15.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) one swing is too slow (c) 10 is a lucky number (d) it is more accurate
16. 16.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a stopwatch (d) a mirror
18. 18.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a mirror (c) a balloon (d) a pencil and tape
19. 19.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
20. 20.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
21. 21.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
22. 22.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 20 seconds?
23. 23.⚖️ 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) the same hook (d) time for 10 swings
24. 24.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) slower (d) quicker
25. 25.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a grandfather clock (d) a digital watch
26. 26.⚖️ 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
27. 27.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a ruler (c) a mirror (d) a battery cell
28. 28.⚖️ 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 same hook (c) time for 10 swings (d) the weight of the bob
29. 29.⚖️ 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
30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) turmeric powder (d) a pencil and tape
31. 31.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
32. 32.True or false: a mirror is not needed for the pendulum. (a) True (b) False
33. 33.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
34. 34.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
35. 35.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it stays the same (c) it doubles (d) it becomes 4 times
36. 36.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
37. 37.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we change it (c) we keep it the same
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a balloon (d) a ruler
40. 40.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a longer string (d) a heavier bob

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