Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 747 · 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.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) the weight of the bob (c) how far we pull it back (d) the string length
2. 2.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a pencil and tape (c) a heavy nut or washer (d) a string
3. 3.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a small nut or washer (c) a sharp tool (d) a heavy brick
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 pendulum takes 2 seconds for one swing. How many swings does it make in 14 seconds?
6. 6.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a battery cell (d) a string
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 change it (b) we keep it the same (c) we measure it
9. 9.🕰️ 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
10. 10.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a heavy nut or washer (c) yeast (d) a magnet
11. 11.⚖️ 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
12. 12.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
13. 13.True or false: a magnet is not needed for the pendulum. (a) False (b) True
14. 14.⚖️ 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
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) how far we pull it back (c) the string length (d) time for 10 swings
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we measure it (c) we keep it the same
17. 17.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it stays the same (c) it doubles (d) it becomes 4 times
18. 18.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
19. 19.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) quicker (d) slower
20. 20.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) gravity (d) the wind
21. 21.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a grandfather clock (d) a phone
22. 22.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
23. 23.⚖️ 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
24. 24.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
25. 25.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
26. 26.⚖️ 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) False (b) True
27. 27.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
28. 28.🧺 Which of these is needed for the pendulum? (a) yeast (b) a mirror (c) a balloon (d) a ruler
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a string (c) a ruler (d) a heavy nut or washer
30. 30.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a heavy nut or washer (d) a mirror
32. 32.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) it cannot swing (d) much faster
33. 33.🧺 Which of these is needed for the pendulum? (a) a string (b) turmeric powder (c) yeast (d) a battery cell
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) False (b) True
35. 35.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) a string (d) a balloon
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.🛟 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
38. 38.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
39. 39.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
40. 40.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?

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