Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 117 · 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 makes 5 swings in 10 seconds. How many seconds does one swing take?
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
3. 3.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 12 seconds?
4. 4.🧺 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 balloon
5. 5.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a small nut or washer (c) a sharp tool (d) a heavy brick
6. 6.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 28 seconds?
7. 7.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a balloon (c) a heavy nut or washer (d) a pencil and tape
8. 8.🔮 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
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) the string length (c) the same hook (d) time for 10 swings
10. 10.⚖️ 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 change it (c) we measure it
11. 11.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a sundial (d) a digital watch
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a stopwatch (d) turmeric powder
13. 13.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
14. 14.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more fun (c) one swing is too slow (d) it is more accurate
15. 15.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is wet (d) it is magnetic
16. 16.True or false: a mirror is not needed for the pendulum. (a) False (b) True
17. 17.⚖️ 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 same hook (c) time for 10 swings
18. 18.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) gravity (c) the string (d) magnetism
19. 19.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
20. 20.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
21. 21.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) about the same (d) much slower
22. 22.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
23. 23.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a string (c) a heavy nut or washer (d) a stopwatch
24. 24.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
25. 25.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 33 seconds?
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a pencil and tape (d) a mirror
27. 27.⚖️ 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
28. 28.⚖️ 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
29. 29.⚖️ 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
30. 30.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
31. 31.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) a ruler (d) yeast
32. 32.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) it stops swinging (c) yes, much faster (d) yes, much slower
33. 33.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) quicker (d) stopped
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we measure it (c) we keep it the same
35. 35.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
36. 36.⚖️ 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
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) True (b) False
38. 38.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
39. 39.⚖️ 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) True (b) False
40. 40.⚖️ 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 measure it (c) we keep it the same

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