Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 361 · 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.True or false: a string is needed for the pendulum. (a) False (b) True
2. 2.🕰️ 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
3. 3.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it becomes 4 times (c) it stays the same (d) it halves
4. 4.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
5. 5.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
6. 6.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more accurate (c) it is more fun (d) 10 is a lucky number
7. 7.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a mirror (c) a pencil and tape (d) a magnet
8. 8.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
9. 9.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a ruler (c) a pencil and tape (d) a heavy nut or washer
10. 10.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
11. 11.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) how far we pull it back (c) the same hook (d) the string length
13. 13.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is hot (c) the bob could hit you (d) it is magnetic
14. 14.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) a battery cell (c) turmeric powder (d) a mirror
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) True (b) False
16. 16.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a heavy brick (d) a glass bottle
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) how far we pull it back (c) time for 10 swings (d) the string length
18. 18.True or false: a string is not needed for the pendulum. (a) False (b) True
19. 19.True or false: yeast is needed for the pendulum. (a) False (b) True
20. 20.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
21. 21.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
22. 22.⚖️ 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 change it (c) we keep it the same
23. 23.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a mirror (d) a stopwatch
24. 24.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
25. 25.⚖️ 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
26. 26.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a mirror (c) yeast (d) a balloon
27. 27.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
28. 28.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a balloon (d) a ruler
30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) a string (d) a battery cell
31. 31.🧺 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 stopwatch
32. 32.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
33. 33.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 28 seconds?
34. 34.⚖️ 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
35. 35.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
36. 36.⚖️ 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
37. 37.⚖️ 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
38. 38.True or false: a battery cell is needed for the pendulum. (a) True (b) False
39. 39.⚖️ 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) how far we pull it back (c) the string length
40. 40.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a digital watch (c) a sundial (d) a phone

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