Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 362 · 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) much faster (b) much slower (c) it cannot swing (d) about the same
2. 2.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
3. 3.⚖️ 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
4. 4.⚖️ 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
5. 5.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
6. 6.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the wind (c) gravity (d) the string
7. 7.🕰️ 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
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) the weight of the bob (c) time for 10 swings (d) the string length
9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a pencil and tape (d) turmeric powder
10. 10.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 20 seconds?
11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) yeast (d) a heavy nut or washer
12. 12.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 14 seconds?
13. 13.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
14. 14.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a stopwatch (d) a battery cell
16. 16.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a sharp tool (c) a glass bottle (d) a heavy brick
17. 17.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
18. 18.🕰️ 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
19. 19.True or false: a magnet is needed for the pendulum. (a) True (b) False
20. 20.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a heavy nut or washer (c) a battery cell (d) a magnet
21. 21.🧺 Which of these is needed for the pendulum? (a) a string (b) turmeric powder (c) a magnet (d) yeast
22. 22.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
23. 23.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a pencil and tape (d) yeast
24. 24.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it doubles (c) it halves (d) it stays the same
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) True (b) False
26. 26.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 20 seconds?
27. 27.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) heavier (c) slower (d) stopped
28. 28.True or false: a ruler is needed for the pendulum. (a) False (b) True
29. 29.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) a magnet (d) a string
30. 30.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) True (b) False
32. 32.True or false: a ruler is not needed for the pendulum. (a) True (b) False
33. 33.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a sundial (d) a phone
34. 34.⚖️ 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) the string length (c) time for 10 swings
35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the same hook (b) the string length (c) time for 10 swings (d) the weight of the bob
36. 36.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a heavier bob (d) a lighter bob
37. 37.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a heavy nut or washer (c) a stopwatch (d) a ruler
38. 38.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
39. 39.⚖️ 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
40. 40.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) a battery cell (d) a pencil and tape

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