Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 913 · 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 heavy nut or washer (b) a string (c) a mirror (d) a stopwatch
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) how far we pull it back (b) the string length (c) the same hook (d) the weight of the bob
3. 3.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 36 seconds?
4. 4.⚖️ 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
5. 5.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much slower (c) much faster (d) it cannot swing
6. 6.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a magnet (d) a string
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we measure it (c) we change it
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) the string length (c) time for 10 swings (d) how far we pull it back
9. 9.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
10. 10.True or false: a magnet is needed for the pendulum. (a) False (b) True
11. 11.⚖️ 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
12. 12.🕰️ 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
13. 13.🧺 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) a battery cell
14. 14.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is hot (c) the bob could hit you (d) it is magnetic
15. 15.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it doubles (d) it halves
16. 16.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
17. 17.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
18. 18.🧺 Which of these is needed for the pendulum? (a) a balloon (b) yeast (c) a heavy nut or washer (d) a battery cell
19. 19.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) heavier (d) stopped
20. 20.⚖️ 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) how far we pull it back
21. 21.⚖️ 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
22. 22.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a sharp tool (d) a heavy brick
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) turmeric powder (c) a ruler (d) a pencil and tape
24. 24.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
25. 25.True or false: a string is needed for the pendulum. (a) True (b) False
26. 26.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
27. 27.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) a pencil and tape (d) yeast
28. 28.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
29. 29.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a balloon (c) a battery cell (d) a pencil and tape
30. 30.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) yeast (c) turmeric powder (d) a stopwatch
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) False (b) True
32. 32.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
33. 33.True or false: a mirror is needed for the pendulum. (a) True (b) False
34. 34.True or false: a string is not needed for the pendulum. (a) True (b) False
35. 35.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) gravity (d) the wind
36. 36.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a phone (c) a grandfather clock (d) a digital watch
37. 37.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
38. 38.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a stopwatch (c) a ruler (d) a pencil and tape
39. 39.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
40. 40.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a pencil and tape (d) turmeric powder

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