Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 718 · 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.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much faster (c) no, hardly at all (d) yes, much slower
2. 2.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the wind (c) the string (d) magnetism
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a heavy nut or washer (d) a mirror
4. 4.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
5. 5.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
6. 6.⚖️ 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) True (b) False
7. 7.⚖️ 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
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a ruler (c) a pencil and tape (d) a stopwatch
9. 9.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a heavier bob (d) a longer string
10. 10.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a heavy nut or washer (c) yeast (d) a mirror
11. 11.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
12. 12.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) heavier (d) slower
13. 13.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a pencil and tape (c) a ruler (d) a string
14. 14.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a ruler (c) a magnet (d) a battery cell
15. 15.⚖️ 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
16. 16.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a glass bottle (d) a heavy brick
17. 17.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 12 seconds?
18. 18.⚖️ 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) False (b) True
19. 19.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 24 seconds?
20. 20.⚖️ 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) how far we pull it back (c) time for 10 swings (d) the string length
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a pencil and tape (c) a heavy nut or washer (d) a stopwatch
22. 22.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
23. 23.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) about the same (c) much faster (d) much slower
24. 24.True or false: a magnet is not needed for the pendulum. (a) False (b) True
25. 25.⚖️ 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
26. 26.⚖️ 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) the weight of the bob (d) how far we pull it back
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) the same hook (c) the string length
28. 28.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it stays the same (c) it becomes 4 times (d) it halves
29. 29.True or false: a battery cell is needed for the pendulum. (a) False (b) True
30. 30.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 14 seconds?
31. 31.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
32. 32.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
33. 33.🛟 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
34. 34.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 13 seconds?
35. 35.⚖️ 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
36. 36.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
37. 37.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a phone (d) a sundial
38. 38.True or false: a mirror is needed for the pendulum. (a) False (b) True
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a string (d) a magnet
40. 40.⚖️ 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

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