Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 170 · 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.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) it is hot (d) the bob could hit you
2. 2.⚖️ 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
3. 3.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 28 seconds?
4. 4.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
5. 5.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it stays the same (c) it halves (d) it becomes 4 times
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a battery cell (d) a ruler
7. 7.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 38 seconds?
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) time for 10 swings (c) the string length
9. 9.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a sundial (c) a phone (d) a digital watch
10. 10.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a ruler (c) a pencil and tape (d) a stopwatch
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we keep it the same (c) we measure it
13. 13.⚖️ 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
14. 14.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
15. 15.⚖️ 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 same hook
16. 16.True or false: a balloon is needed for the pendulum. (a) False (b) True
17. 17.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a shorter string (c) a longer string (d) a heavier bob
18. 18.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more accurate (c) it is more fun (d) one swing is too slow
19. 19.⚖️ 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 measure it (b) we keep it the same (c) we change it
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is kept the same. (a) False (b) True
21. 21.🧺 Which of these is needed for the pendulum? (a) a magnet (b) yeast (c) a ruler (d) a balloon
22. 22.⚖️ 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) True (b) False
23. 23.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) turmeric powder (c) a string (d) a ruler
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) yeast (c) a stopwatch (d) a pencil and tape
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) time for 10 swings (c) the string length
27. 27.🧺 Which of these is needed for the pendulum? (a) a balloon (b) turmeric powder (c) a string (d) a magnet
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) the weight of the bob (c) how far we pull it back (d) the same hook
29. 29.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?
30. 30.⚖️ 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 keep it the same (c) we measure it
31. 31.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) magnetism (c) the string (d) the wind
32. 32.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 18 seconds?
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a ruler (d) a magnet
34. 34.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 12 seconds?
35. 35.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
36. 36.🔮 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
37. 37.True or false: a magnet is needed for the pendulum. (a) True (b) False
38. 38.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) a stopwatch (d) a balloon
39. 39.⚖️ 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
40. 40.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed

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