Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 502 · 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 ruler (b) a heavy nut or washer (c) turmeric powder (d) a string
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) True (b) False
3. 3.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we keep it the same (c) we change it
5. 5.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 11 seconds?
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a battery cell (d) a pencil and tape
7. 7.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) much faster (c) about the same (d) it cannot swing
8. 8.⚖️ 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
9. 9.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) 10 is a lucky number (c) it is more fun (d) one swing is too slow
10. 10.⚖️ 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 keep it the same (c) we measure it
11. 11.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) stopped (d) heavier
12. 12.True or false: a magnet is needed for the pendulum. (a) True (b) False
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a balloon (d) a ruler
14. 14.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) a battery cell (d) a ruler
15. 15.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a digital watch (d) a sundial
16. 16.⚖️ 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
17. 17.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a stopwatch (c) a magnet (d) a pencil and tape
18. 18.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it becomes 4 times (d) it doubles
19. 19.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?
20. 20.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a pencil and tape (c) a heavy nut or washer (d) a string
21. 21.True or false: a mirror is needed for the pendulum. (a) True (b) False
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) False (b) True
23. 23.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a heavy brick (c) a glass bottle (d) a sharp tool
24. 24.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) False (b) True
26. 26.⚖️ 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
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
28. 28.⚖️ 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
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we change it (c) we measure it
30. 30.⚖️ 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 keep it the same (c) we change it
31. 31.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
32. 32.True or false: a string is not needed for the pendulum. (a) True (b) False
33. 33.⚖️ 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
34. 34.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) yes, much faster (c) it stops swinging (d) no, hardly at all
35. 35.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) the wind (d) gravity
36. 36.🧺 Which of these is needed for the pendulum? (a) a balloon (b) yeast (c) turmeric powder (d) a string
37. 37.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a heavy nut or washer (c) a pencil and tape (d) a string
38. 38.🧺 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
39. 39.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
40. 40.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) yeast (c) a string (d) a stopwatch

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