Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 382 · 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.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
2. 2.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) the bob could hit you (d) it is wet
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a heavy nut or washer (d) a balloon
4. 4.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it becomes 4 times (d) it stays the same
5. 5.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) how far we pull it back (c) time for 10 swings (d) the weight of the bob
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we change it (c) we keep it the same
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) False (b) True
9. 9.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) a stopwatch (d) a magnet
10. 10.⚖️ 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
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we change it (c) we keep it the same
12. 12.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a ruler (c) a balloon (d) a magnet
13. 13.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a lighter bob (c) a heavier bob (d) a shorter string
14. 14.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a stopwatch (c) a ruler (d) a heavy nut or washer
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) turmeric powder (c) a ruler (d) a stopwatch
16. 16.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
17. 17.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
18. 18.True or false: a balloon is needed for the pendulum. (a) True (b) False
19. 19.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
20. 20.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) slower (d) heavier
21. 21.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 32 seconds?
22. 22.⚖️ 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 measure it (c) we keep it the same
23. 23.⚖️ 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
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
25. 25.⚖️ 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
26. 26.True or false: a mirror is needed for the pendulum. (a) True (b) False
27. 27.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
28. 28.🕰️ 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) it is more accurate (d) 10 is a lucky number
29. 29.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a heavy brick (c) a sharp tool (d) a glass bottle
30. 30.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
31. 31.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
32. 32.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
33. 33.⚖️ 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) the same hook (c) the string length (d) how far we pull it back
34. 34.🧺 Which of these is needed for the pendulum? (a) a string (b) yeast (c) turmeric powder (d) a balloon
35. 35.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a grandfather clock (c) a digital watch (d) a phone
36. 36.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) the string (c) gravity (d) magnetism
37. 37.True or false: yeast is needed for the pendulum. (a) False (b) True
38. 38.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a heavy nut or washer (d) a battery cell
40. 40.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed

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