Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 306 · 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) a pencil and tape (b) yeast (c) a heavy nut or washer (d) a string
2. 2.⚖️ 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 measure it (c) we keep it the same
3. 3.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
4. 4.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a longer string (c) a heavier bob (d) a shorter string
5. 5.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a pencil and tape (c) a string (d) a ruler
7. 7.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
9. 9.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) gravity (c) magnetism (d) the wind
10. 10.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a ruler (c) a balloon (d) a battery cell
11. 11.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
12. 12.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more fun (c) it is more accurate (d) one swing is too slow
13. 13.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
14. 14.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a pencil and tape (c) a balloon (d) a string
15. 15.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 60 seconds?
16. 16.True or false: a balloon is needed for the pendulum. (a) True (b) False
17. 17.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a mirror (c) a heavy nut or washer (d) a magnet
18. 18.🛟 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
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we change it (c) we measure it
20. 20.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
21. 21.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
22. 22.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a magnet (c) a string (d) a ruler
23. 23.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
24. 24.True or false: a mirror is not needed for the pendulum. (a) False (b) True
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we measure it (c) we keep it the same
26. 26.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
27. 27.True or false: a mirror is needed for the pendulum. (a) False (b) True
28. 28.⚖️ 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) how far we pull it back (d) time for 10 swings
29. 29.🔮 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
30. 30.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a ruler (c) a stopwatch (d) turmeric powder
31. 31.⚖️ 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 weight of the bob (c) how far we pull it back (d) the same hook
32. 32.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a sundial (c) a digital watch (d) a phone
33. 33.⚖️ 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
34. 34.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a stopwatch (c) a balloon (d) a mirror
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a balloon (d) a heavy nut or washer
36. 36.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) heavier (d) stopped
37. 37.True or false: a ruler is needed for the pendulum. (a) False (b) True
38. 38.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
39. 39.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
40. 40.⚖️ 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

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