Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 473 · 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 do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more fun (c) it is more accurate (d) 10 is a lucky number
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
3. 3.🧺 Which of these is not needed for the pendulum? (a) a string (b) a stopwatch (c) a magnet (d) a ruler
4. 4.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) quicker (d) slower
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a stopwatch (c) a string (d) a heavy nut or washer
6. 6.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it doubles (d) it stays the same
7. 7.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) turmeric powder (c) a heavy nut or washer (d) a mirror
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a mirror (c) a ruler (d) a heavy nut or washer
9. 9.⚖️ 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 measure it (c) we keep it the same
10. 10.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a balloon (d) a pencil and tape
12. 12.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
13. 13.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
14. 14.⚖️ 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) the weight of the bob (c) time for 10 swings (d) how far we pull it back
15. 15.True or false: a mirror is not needed for the pendulum. (a) False (b) True
16. 16.⚖️ 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
17. 17.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) no, hardly at all (c) yes, much slower (d) it stops swinging
18. 18.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the wind (d) the string
19. 19.🧺 Which of these is needed for the pendulum? (a) a magnet (b) yeast (c) a mirror (d) a pencil and tape
20. 20.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) yeast (d) a heavy nut or washer
22. 22.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
23. 23.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
24. 24.⚖️ 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) the weight of the bob (c) the same hook (d) the string length
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) False (b) True
26. 26.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is wet (d) it is hot
27. 27.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
28. 28.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a stopwatch (c) a string (d) a pencil and tape
29. 29.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 28 seconds?
30. 30.⚖️ 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
31. 31.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
32. 32.⚖️ 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
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) turmeric powder (d) a pencil and tape
34. 34.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
35. 35.⚖️ 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
36. 36.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a small nut or washer (d) a heavy brick
37. 37.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a phone (d) a grandfather clock
38. 38.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 32 seconds?
39. 39.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
40. 40.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 30 seconds?

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