Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 318 · 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.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) heavier (c) stopped (d) slower
2. 2.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a small nut or washer (d) a heavy brick
3. 3.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a grandfather clock (d) a phone
4. 4.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is wet (c) it is hot (d) it is magnetic
5. 5.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 30 seconds?
6. 6.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) turmeric powder (d) a string
7. 7.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
8. 8.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) yes, much slower (c) it stops swinging (d) no, hardly at all
9. 9.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it doubles (d) it halves
10. 10.⚖️ 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
11. 11.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a stopwatch (c) a heavy nut or washer (d) a ruler
13. 13.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a pencil and tape (c) a battery cell (d) yeast
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) the string length (c) how far we pull it back (d) the weight of the bob
15. 15.⚖️ 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
16. 16.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a stopwatch (d) a balloon
18. 18.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) yeast (c) a stopwatch (d) a pencil and tape
19. 19.⚖️ 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 keep it the same (c) we measure it
20. 20.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
21. 21.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
22. 22.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
23. 23.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) it cannot swing (c) much slower (d) much faster
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) False (b) True
25. 25.True or false: a ruler 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 “time for 10 swings”? (a) we measure it (b) we change it (c) we keep it the same
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a mirror (d) a pencil and tape
28. 28.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a ruler (c) yeast (d) a magnet
29. 29.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) gravity (d) the wind
30. 30.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
31. 31.⚖️ 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 keep it the same (b) we change it (c) we measure it
32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) the weight of the bob (c) the same hook (d) time for 10 swings
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
34. 34.⚖️ 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
35. 35.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
37. 37.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a longer string (d) a shorter string
38. 38.🧺 Which of these is not needed for the pendulum? (a) a string (b) a battery cell (c) a heavy nut or washer (d) a pencil and tape
39. 39.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a mirror (c) a heavy nut or washer (d) a magnet
40. 40.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed

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