Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 689 · 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.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a glass bottle (d) a small nut or washer
2. 2.⚖️ 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) how far we pull it back (c) time for 10 swings (d) the same hook
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) the string length (c) time for 10 swings
4. 4.⚖️ 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 measure it (c) we change it
5. 5.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 45 seconds?
6. 6.⚖️ 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
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is kept the same. (a) False (b) True
8. 8.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
9. 9.⚖️ 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
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) how far we pull it back (c) time for 10 swings
11. 11.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a longer string (d) a heavier bob
12. 12.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a pencil and tape (c) a battery cell (d) a magnet
13. 13.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a stopwatch (c) a string (d) turmeric powder
14. 14.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) it is magnetic (d) the bob could hit you
15. 15.True or false: a string is not needed for the pendulum. (a) False (b) True
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) time for 10 swings (c) how far we pull it back (d) the same hook
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a balloon (c) a ruler (d) a heavy nut or washer
18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a pencil and tape (c) a ruler (d) a string
19. 19.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) yes, much slower (c) no, hardly at all (d) it stops swinging
20. 20.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
21. 21.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
22. 22.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a stopwatch (d) a battery cell
24. 24.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 15 seconds?
25. 25.🧺 Which of these is not needed for the pendulum? (a) a string (b) a mirror (c) a heavy nut or washer (d) a stopwatch
26. 26.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
27. 27.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) quicker (d) slower
28. 28.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
29. 29.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a magnet (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 stopwatch (c) yeast (d) a heavy nut or washer
31. 31.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) the wind (c) magnetism (d) gravity
32. 32.🧺 Which of these is needed for the pendulum? (a) a balloon (b) yeast (c) a string (d) a magnet
33. 33.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) False (b) True
35. 35.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a stopwatch (c) a battery cell (d) a string
36. 36.⚖️ 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
37. 37.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
38. 38.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
39. 39.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
40. 40.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed

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