Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 717 · 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.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 32 seconds?
2. 2.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) much faster (c) about the same (d) it cannot swing
3. 3.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) heavier (d) stopped
4. 4.⚖️ 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 measure it (c) we change it
5. 5.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a small nut or washer (d) a heavy brick
6. 6.⚖️ 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
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a mirror (c) a string (d) a stopwatch
8. 8.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
9. 9.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a digital watch (c) a sundial (d) a phone
10. 10.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
11. 11.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a battery cell (c) a pencil and tape (d) yeast
12. 12.⚖️ 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 weight of the bob (c) the string length
13. 13.True or false: a ruler is needed for the pendulum. (a) True (b) False
14. 14.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is hot (d) it is wet
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) a heavy nut or washer (d) turmeric powder
16. 16.⚖️ 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
17. 17.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) it is more fun (c) one swing is too slow (d) 10 is a lucky number
18. 18.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) time for 10 swings (c) the string length
20. 20.⚖️ 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) False (b) True
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) a pencil and tape (d) a battery cell
22. 22.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
23. 23.🧺 Which of these is needed for the pendulum? (a) a balloon (b) yeast (c) a heavy nut or washer (d) a magnet
24. 24.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a lighter bob (c) a shorter string (d) a heavier bob
25. 25.⚖️ 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) False (b) True
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a magnet (c) a pencil and tape (d) a ruler
27. 27.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
28. 28.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) yeast (d) a ruler
29. 29.⚖️ 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) True (b) False
30. 30.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much slower (c) no, hardly at all (d) yes, much faster
31. 31.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
32. 32.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
33. 33.🔮 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 halves (d) it doubles
34. 34.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
35. 35.⚖️ 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 string length (c) how far we pull it back
36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we measure it (c) we keep it the same
37. 37.⚖️ 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
38. 38.⚖️ 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
39. 39.⚖️ 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 string length (c) the same hook (d) time for 10 swings
40. 40.🧺 Which of these is needed for the pendulum? (a) a balloon (b) turmeric powder (c) yeast (d) a stopwatch

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