Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 286 · 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 takes 2 seconds for one swing. How many swings does it make in 30 seconds?
2. 2.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
3. 3.True or false: yeast is needed for the pendulum. (a) False (b) True
4. 4.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) turmeric powder (d) a heavy nut or washer
6. 6.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
7. 7.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
8. 8.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is wet (c) it is magnetic (d) it is hot
9. 9.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) stopped (d) heavier
10. 10.🕰️ 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
11. 11.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a magnet (c) turmeric powder (d) a balloon
12. 12.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it doubles (d) it halves
13. 13.⚖️ 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
14. 14.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a heavy nut or washer (c) a balloon (d) turmeric powder
15. 15.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a magnet (c) a stopwatch (d) a string
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we change it (c) we measure it
17. 17.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
18. 18.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a digital watch (d) a sundial
19. 19.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a string (c) a stopwatch (d) a heavy nut or washer
20. 20.True or false: a mirror is not needed for the pendulum. (a) True (b) False
21. 21.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
22. 22.⚖️ 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
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) time for 10 swings (c) the string length
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 change it (c) we measure it
25. 25.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) the wind (d) gravity
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a balloon (c) a stopwatch (d) a string
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a battery cell (c) a ruler (d) a pencil and tape
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) the string length (c) the same hook (d) the weight of the bob
29. 29.⚖️ 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) the string length (c) time for 10 swings
30. 30.⚖️ 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
31. 31.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a small nut or washer (d) a heavy brick
32. 32.True or false: a ruler is not needed for the pendulum. (a) True (b) False
33. 33.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) it stops swinging (c) no, hardly at all (d) yes, much slower
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a heavy nut or washer (d) yeast
35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we change it (c) we measure it
36. 36.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
37. 37.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
38. 38.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
39. 39.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
40. 40.⚖️ 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

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