Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 275 · 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.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
2. 2.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) the string (c) magnetism (d) gravity
3. 3.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) how far we pull it back
5. 5.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) stopped (d) quicker
6. 6.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a balloon (c) a heavy nut or washer (d) yeast
7. 7.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
8. 8.⚖️ 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
9. 9.⚖️ 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 change it (b) we measure it (c) we keep it the same
10. 10.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) the bob could hit you (d) it is hot
11. 11.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
12. 12.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 9 seconds?
13. 13.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
14. 14.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
15. 15.🧺 Which of these is needed for the pendulum? (a) a magnet (b) turmeric powder (c) a battery cell (d) a ruler
16. 16.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) it stops swinging (c) yes, much faster (d) no, hardly at all
17. 17.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a phone (c) a grandfather clock (d) a digital watch
18. 18.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
19. 19.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a heavy brick (d) a sharp tool
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a balloon (d) a pencil and tape
21. 21.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a pencil and tape (c) a balloon (d) a battery cell
22. 22.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 14 seconds?
23. 23.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
24. 24.⚖️ 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
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) yeast (d) a ruler
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the same hook
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a heavy nut or washer (c) a pencil and tape (d) a stopwatch
28. 28.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a stopwatch (c) a ruler (d) a string
29. 29.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a heavier bob (c) a shorter string (d) a lighter bob
30. 30.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it doubles (c) it becomes 4 times (d) it halves
31. 31.⚖️ 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
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a pencil and tape (d) a battery cell
33. 33.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
34. 34.🧺 Which of these is needed for the pendulum? (a) a string (b) a balloon (c) a battery cell (d) a mirror
35. 35.True or false: a battery cell is needed for the pendulum. (a) False (b) True
36. 36.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
37. 37.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more accurate (c) one swing is too slow (d) it is more fun
38. 38.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a balloon (c) a stopwatch (d) a string
39. 39.🧺 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 mirror (d) a ruler
40. 40.⚖️ 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

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