Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 772 · 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) the same hook (b) the weight of the bob (c) the string length (d) time for 10 swings
2. 2.⚖️ 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
3. 3.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a ruler (c) a heavy nut or washer (d) a pencil and tape
5. 5.🛟 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
6. 6.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
7. 7.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a grandfather clock (d) a digital watch
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) how far we pull it back (b) the string length (c) the weight of the bob (d) the same hook
9. 9.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a longer string (d) a heavier bob
10. 10.⚖️ 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
11. 11.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) it cannot swing (d) about the same
12. 12.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a stopwatch (c) a string (d) a magnet
13. 13.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it doubles (d) it stays the same
14. 14.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a string (c) a mirror (d) a balloon
15. 15.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is hot (d) it is magnetic
16. 16.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
17. 17.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
18. 18.⚖️ 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
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) True (b) False
20. 20.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) a string (d) turmeric powder
21. 21.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
22. 22.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
23. 23.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
24. 24.True or false: a string is needed for the pendulum. (a) False (b) True
25. 25.True or false: a balloon is not needed for the pendulum. (a) True (b) False
26. 26.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
27. 27.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
28. 28.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
29. 29.🧺 Which of these is needed for the pendulum? (a) a balloon (b) yeast (c) a mirror (d) a ruler
30. 30.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
31. 31.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a stopwatch (c) a ruler (d) a string
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a battery cell (c) a heavy nut or washer (d) a stopwatch
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is the one thing we change. (a) True (b) False
34. 34.⚖️ 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
35. 35.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
36. 36.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
37. 37.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) heavier (d) stopped
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) a pencil and tape (d) a magnet
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a ruler (d) a mirror
40. 40.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more fun (c) it is more accurate (d) 10 is a lucky number

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