Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 212 · 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.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) the bob could hit you (d) it is wet
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we measure it (c) we keep it the same
3. 3.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
4. 4.⚖️ 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
5. 5.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
6. 6.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a heavy nut or washer (c) a ruler (d) a stopwatch
7. 7.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a phone (c) a sundial (d) a digital watch
8. 8.⚖️ 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 measure it (c) we change it
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
10. 10.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) the weight of the bob (c) time for 10 swings (d) the string length
12. 12.⚖️ 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
13. 13.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a small nut or washer (d) a sharp tool
14. 14.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it stays the same (c) it becomes 4 times (d) it doubles
15. 15.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
16. 16.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
17. 17.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) no, hardly at all (c) yes, much faster (d) yes, much slower
18. 18.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a battery cell (c) a ruler (d) a string
19. 19.⚖️ 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) True (b) False
20. 20.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 14 seconds?
21. 21.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) heavier (d) slower
22. 22.⚖️ 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 measure it (b) we change it (c) we keep it the same
23. 23.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
24. 24.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a lighter bob (d) a shorter string
25. 25.True or false: a balloon is needed for the pendulum. (a) False (b) True
26. 26.🕰️ 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
27. 27.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) a magnet (d) a pencil and tape
28. 28.True or false: yeast is not needed for the pendulum. (a) True (b) False
29. 29.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
30. 30.⚖️ 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 measure it (c) we change it
31. 31.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 38 seconds?
32. 32.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 30 seconds?
33. 33.True or false: a ruler is needed for the pendulum. (a) False (b) True
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) turmeric powder (d) a ruler
35. 35.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
36. 36.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the wind (d) the string
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a stopwatch (d) a battery cell
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a magnet (d) a string
39. 39.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
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 same hook (b) the string length (c) time for 10 swings (d) the weight of the bob

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