Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 823 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a magnet (c) a heavy nut or washer (d) a string
2. 2.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a phone (c) a digital watch (d) a grandfather clock
3. 3.🕰️ 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
4. 4.🔮 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 halves (d) it stays the same
5. 5.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 36 seconds?
6. 6.⚖️ 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 string length (c) how far we pull it back (d) the same hook
7. 7.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
8. 8.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
9. 9.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
10. 10.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a small nut or washer (c) a heavy brick (d) a sharp tool
11. 11.⚖️ 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 weight of the bob
12. 12.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) 10 is a lucky number (c) one swing is too slow (d) it is more accurate
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we change it (c) we measure it
14. 14.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
15. 15.True or false: a string is not needed for the pendulum. (a) True (b) False
16. 16.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) the bob could hit you (d) it is hot
17. 17.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) a ruler (d) a magnet
18. 18.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a pencil and tape (c) a stopwatch (d) a string
20. 20.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
21. 21.⚖️ 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
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) time for 10 swings (c) the string length
23. 23.🧺 Which of these is needed for the pendulum? (a) yeast (b) a pencil and tape (c) a battery cell (d) a mirror
24. 24.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a balloon (d) a ruler
26. 26.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a heavy nut or washer (c) a string (d) a pencil and tape
27. 27.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
28. 28.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a ruler (c) a battery cell (d) yeast
29. 29.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) stopped (d) quicker
30. 30.⚖️ 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
31. 31.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
32. 32.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) it cannot swing (c) about the same (d) much slower
33. 33.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) yeast (c) a heavy nut or washer (d) a string
35. 35.⚖️ 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) True (b) False
36. 36.True or false: a balloon is not needed for the pendulum. (a) True (b) False
37. 37.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a heavier bob (c) a shorter string (d) a lighter bob
38. 38.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the wind (c) magnetism (d) the string
39. 39.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
40. 40.🧺 Which of these is needed for the pendulum? (a) yeast (b) a string (c) a battery cell (d) a magnet

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