Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 670 · 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 heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much slower (c) it cannot swing (d) much faster
2. 2.⚖️ 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
3. 3.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more fun (c) one swing is too slow (d) it is more accurate
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
5. 5.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) a pencil and tape (d) a mirror
6. 6.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) yeast (c) a string (d) a stopwatch
7. 7.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) slower (d) heavier
8. 8.⚖️ 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
9. 9.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a string (c) a magnet (d) a mirror
10. 10.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
11. 11.⚖️ 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) how far we pull it back (d) the string length
12. 12.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it stays the same (d) it becomes 4 times
13. 13.⚖️ 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) time for 10 swings (c) the string length (d) how far we pull it back
14. 14.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we measure it (c) we keep it the same
16. 16.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
17. 17.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
18. 18.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a shorter string (c) a heavier bob (d) a longer string
19. 19.⚖️ 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) True (b) False
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a balloon (c) a ruler (d) a heavy nut or washer
21. 21.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
23. 23.True or false: a balloon is not needed for the pendulum. (a) False (b) True
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a heavy nut or washer (c) a string (d) a ruler
25. 25.True or false: yeast is not needed for the pendulum. (a) False (b) True
26. 26.⚖️ 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
27. 27.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a sharp tool (d) a small nut or washer
28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) turmeric powder (d) a pencil and tape
29. 29.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 54 seconds?
30. 30.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a pencil and tape (c) a string (d) a battery cell
32. 32.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a heavy nut or washer (c) a magnet (d) yeast
33. 33.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a sundial (c) a phone (d) a digital watch
34. 34.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
35. 35.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a ruler (c) a balloon (d) a magnet
36. 36.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
37. 37.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) it is wet (d) the bob could hit you
38. 38.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
39. 39.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 60 seconds?
40. 40.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the string (c) the wind (d) magnetism

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