Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 488 · 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 stopwatch for the pendulum? (a) needed (b) not needed
2. 2.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a string (c) a balloon (d) turmeric powder
3. 3.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) the bob could hit you (d) it is wet
4. 4.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) about the same (c) much slower (d) it cannot swing
5. 5.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) quicker (d) slower
6. 6.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
7. 7.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the wind (c) gravity (d) the string
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is kept the same. (a) False (b) True
9. 9.⚖️ 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
10. 10.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
11. 11.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a stopwatch (c) a pencil and tape (d) a magnet
12. 12.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a small nut or washer (d) a glass bottle
13. 13.⚖️ 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
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 weight of the bob (b) the same hook (c) the string length (d) time for 10 swings
15. 15.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 8 seconds?
16. 16.🕰️ 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
17. 17.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a phone (c) a digital watch (d) a grandfather clock
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is the one thing we change. (a) True (b) False
19. 19.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
20. 20.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a stopwatch (d) a battery cell
21. 21.True or false: a balloon is needed for the pendulum. (a) False (b) True
22. 22.⚖️ 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 keep it the same (c) we change it
23. 23.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
24. 24.True or false: a string is not needed for the pendulum. (a) True (b) False
25. 25.True or false: a ruler is needed for the pendulum. (a) False (b) True
26. 26.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a heavier bob (d) a longer string
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a magnet (d) a ruler
28. 28.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
29. 29.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a balloon (c) a string (d) a pencil and tape
31. 31.🕰️ 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
32. 32.True or false: a balloon is not needed for the pendulum. (a) True (b) False
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we change it (c) we measure it
34. 34.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a heavy nut or washer (c) a ruler (d) a pencil and tape
35. 35.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
36. 36.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a ruler (c) a balloon (d) turmeric powder
37. 37.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
38. 38.⚖️ 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) how far we pull it back
39. 39.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
40. 40.⚖️ 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 measure it (c) we keep it the same

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