Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 208 · 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.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
2. 2.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
3. 3.True or false: a balloon is not needed for the pendulum. (a) True (b) False
4. 4.⚖️ 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
5. 5.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) the bob could hit you (d) it is magnetic
6. 6.⚖️ 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
7. 7.⚖️ 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
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a heavy nut or washer (d) yeast
9. 9.⚖️ 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
10. 10.True or false: a balloon is needed for the pendulum. (a) True (b) False
11. 11.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a ruler (c) yeast (d) a balloon
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we keep it the same (c) we change it
13. 13.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
14. 14.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a stopwatch (c) turmeric powder (d) a pencil and tape
15. 15.⚖️ 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) the weight of the bob
16. 16.True or false: a ruler is needed for the pendulum. (a) True (b) False
17. 17.⚖️ 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
18. 18.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) it cannot swing (c) much slower (d) much faster
19. 19.🕰️ 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
20. 20.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a phone (c) a sundial (d) a grandfather clock
21. 21.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
22. 22.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) 10 is a lucky number (c) it is more fun (d) it is more accurate
23. 23.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) the wind (d) gravity
24. 24.⚖️ 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 keep it the same (b) we measure it (c) we change it
25. 25.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a small nut or washer (c) a sharp tool (d) a glass bottle
26. 26.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a stopwatch (d) a balloon
28. 28.⚖️ 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
29. 29.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
30. 30.True or false: a ruler is not needed for the pendulum. (a) True (b) False
31. 31.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
32. 32.🔮 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 stays the same (d) it doubles
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) turmeric powder (d) a string
34. 34.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
35. 35.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
36. 36.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) turmeric powder (d) a pencil and tape
37. 37.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a shorter string (c) a heavier bob (d) a lighter bob
38. 38.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
40. 40.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) a balloon (d) a string

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