Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 869 · 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 heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) it cannot swing (c) much faster (d) about the same
2. 2.🧺 Which of these is needed for the pendulum? (a) a balloon (b) turmeric powder (c) a mirror (d) a string
3. 3.True or false: yeast is not needed for the pendulum. (a) True (b) False
4. 4.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
5. 5.True or false: a battery cell is needed for the pendulum. (a) True (b) False
6. 6.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 20 seconds?
7. 7.🕰️ 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
8. 8.⚖️ 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
9. 9.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a battery cell (c) a pencil and tape (d) a balloon
10. 10.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) one swing is too slow (c) it is more fun (d) 10 is a lucky number
11. 11.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is wet (c) it is hot (d) it is magnetic
12. 12.⚖️ 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
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we keep it the same (c) we change it
14. 14.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) magnetism (c) the string (d) gravity
15. 15.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
16. 16.⚖️ 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
17. 17.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a stopwatch (c) a ruler (d) a pencil and tape
18. 18.⚖️ 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 change it (c) we keep it the same
19. 19.True or false: a ruler is not needed for the pendulum. (a) False (b) True
20. 20.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it becomes 4 times (d) it doubles
21. 21.True or false: a balloon is not needed for the pendulum. (a) True (b) False
22. 22.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) turmeric powder (c) a stopwatch (d) a ruler
24. 24.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a phone (c) a grandfather clock (d) a sundial
25. 25.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 20 seconds?
26. 26.True or false: a string is not needed for the pendulum. (a) True (b) False
27. 27.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
28. 28.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a stopwatch (c) yeast (d) a magnet
29. 29.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we keep it the same (c) we change it
31. 31.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
32. 32.🧺 Which of these is not needed for the pendulum? (a) a string (b) a balloon (c) a stopwatch (d) a ruler
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) False (b) True
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) yeast (d) a stopwatch
35. 35.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
36. 36.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) stopped (d) quicker
37. 37.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 30 seconds?
38. 38.True or false: a mirror is needed for the pendulum. (a) False (b) True
39. 39.🧺 Which of these is not needed for the pendulum? (a) a string (b) a battery cell (c) a pencil and tape (d) a heavy nut or washer
40. 40.⚖️ 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 same hook (c) the weight of the bob (d) the string length

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