Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 429 · 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 kept the same? (a) time for 10 swings (b) how far we pull it back (c) the string length
2. 2.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) quicker (d) stopped
3. 3.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a battery cell (c) a ruler (d) a mirror
4. 4.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
5. 5.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much faster (c) it cannot swing (d) much slower
6. 6.⚖️ 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
7. 7.⚖️ 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
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a stopwatch (c) a pencil and tape (d) a heavy nut or washer
9. 9.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
10. 10.⚖️ 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 same hook (d) the weight of the bob
11. 11.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is hot (c) the bob could hit you (d) it is magnetic
12. 12.🧺 Which of these is needed for the pendulum? (a) yeast (b) turmeric powder (c) a battery cell (d) a pencil and tape
13. 13.⚖️ 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) how far we pull it back (d) the string length
14. 14.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
15. 15.True or false: a balloon is needed for the pendulum. (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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a mirror (d) a heavy nut or washer
18. 18.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) a mirror (d) a ruler
19. 19.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) a pencil and tape (d) yeast
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we change it (c) we measure it
21. 21.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a phone (d) a sundial
22. 22.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
23. 23.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) 10 is a lucky number (c) it is more accurate (d) one swing is too slow
24. 24.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
25. 25.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) turmeric powder (d) a string
26. 26.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) a mirror (c) a balloon (d) turmeric powder
27. 27.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a pencil and tape (c) a magnet (d) a string
29. 29.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it doubles (c) it stays the same (d) it halves
30. 30.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 14 seconds?
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
32. 32.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
34. 34.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
35. 35.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
36. 36.⚖️ 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
37. 37.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) turmeric powder (d) a stopwatch
39. 39.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a shorter string (d) a longer string
40. 40.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed

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