Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 137 · 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.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a sharp tool (c) a heavy brick (d) a glass bottle
2. 2.🔮 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 faster (d) much slower
3. 3.⚖️ 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
4. 4.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a balloon (c) a pencil and tape (d) a stopwatch
6. 6.🔮 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
7. 7.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a heavy nut or washer (d) a battery cell
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is the one thing we change. (a) True (b) False
9. 9.True or false: a balloon is not needed for the pendulum. (a) True (b) False
10. 10.True or false: a string is needed for the pendulum. (a) True (b) False
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) False (b) True
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a string (c) a ruler (d) a pencil and tape
13. 13.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a string (c) a battery cell (d) a magnet
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) the weight of the bob (d) how far we pull it back
15. 15.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
16. 16.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) gravity (c) magnetism (d) the string
17. 17.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a shorter string (c) a longer string (d) a heavier bob
18. 18.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we keep it the same (c) we measure it
20. 20.True or false: a string is not needed for the pendulum. (a) False (b) True
21. 21.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
22. 22.⚖️ 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
23. 23.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is wet (d) it is magnetic
24. 24.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
25. 25.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?
26. 26.⚖️ 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) the weight of the bob
27. 27.⚖️ 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
28. 28.True or false: a ruler is not needed for the pendulum. (a) True (b) False
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a mirror (d) a string
30. 30.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
31. 31.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 48 seconds?
32. 32.⚖️ 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
33. 33.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 20 seconds?
34. 34.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
35. 35.🧺 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
36. 36.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a sundial (c) a phone (d) a digital watch
37. 37.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
38. 38.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
39. 39.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) quicker (d) slower
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) the weight of the bob (c) the string length (d) time for 10 swings

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