Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 680 · 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 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it stays the same (d) it becomes 4 times
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we change it (c) we keep it the same
3. 3.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a glass bottle (d) a small nut or washer
4. 4.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
5. 5.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is wet (d) it is hot
6. 6.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
7. 7.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) False (b) True
9. 9.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) yeast (d) a heavy nut or washer
11. 11.⚖️ 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
12. 12.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) a string (d) a mirror
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a balloon (d) a string
14. 14.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the wind (d) the string
15. 15.⚖️ 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
16. 16.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a battery cell (c) a string (d) a stopwatch
17. 17.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True
19. 19.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
20. 20.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a shorter string (c) a lighter bob (d) a heavier bob
21. 21.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
23. 23.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
24. 24.True or false: a ruler is not needed for the pendulum. (a) True (b) False
25. 25.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 17 seconds?
26. 26.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) quicker (d) stopped
27. 27.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a battery cell (c) yeast (d) a ruler
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) time for 10 swings (c) the string length (d) how far we pull it back
29. 29.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 11 seconds?
30. 30.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
31. 31.🧺 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
32. 32.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
33. 33.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 26 seconds?
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a ruler (d) turmeric powder
35. 35.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) yeast (d) a string
36. 36.⚖️ 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
37. 37.True or false: a ruler is needed for the pendulum. (a) True (b) False
38. 38.⚖️ 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 measure it (c) we change it
39. 39.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) no, hardly at all (c) yes, much slower (d) yes, much faster
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the weight of the bob (c) time for 10 swings

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