Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 730 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a stopwatch (c) a string (d) a pencil and tape
2. 2.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
3. 3.True or false: a string is needed for the pendulum. (a) True (b) False
4. 4.🔮 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
5. 5.⚖️ 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) True (b) False
6. 6.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
7. 7.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) the bob could hit you (d) it is wet
8. 8.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 10 seconds?
9. 9.⚖️ 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
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a mirror (d) a string
11. 11.🧺 Which of these is not needed for the pendulum? (a) a string (b) a heavy nut or washer (c) a magnet (d) a ruler
12. 12.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
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.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) magnetism (c) the wind (d) the string
15. 15.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a battery cell (c) a balloon (d) a ruler
16. 16.True or false: yeast 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 the one thing we change? (a) time for 10 swings (b) the weight of the bob (c) the string length (d) how far we pull it back
18. 18.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a balloon (c) a stopwatch (d) a string
19. 19.⚖️ 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
20. 20.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
21. 21.⚖️ 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
22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a pencil and tape (c) a heavy nut or washer (d) a ruler
23. 23.True or false: a ruler is not needed for the pendulum. (a) False (b) True
24. 24.⚖️ 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
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) how far we pull it back (c) the same hook (d) time for 10 swings
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
27. 27.⚖️ 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
28. 28.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
29. 29.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a sharp tool (d) a small nut or washer
30. 30.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
31. 31.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) quicker (d) slower
32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) True (b) False
33. 33.True or false: a mirror is not needed for the pendulum. (a) False (b) True
34. 34.True or false: a balloon is needed for the pendulum. (a) True (b) False
35. 35.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) one swing is too slow (c) 10 is a lucky number (d) it is more accurate
36. 36.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a phone (d) a sundial
37. 37.⚖️ 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
38. 38.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a stopwatch (c) a magnet (d) a balloon
39. 39.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
40. 40.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) it stops swinging (c) yes, much faster (d) no, hardly at all

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