Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 241 · 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) a heavy nut or washer (c) turmeric powder (d) a ruler
2. 2.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
3. 3.⚖️ 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) time for 10 swings (c) the string length (d) how far we pull it back
4. 4.True or false: a mirror is needed for the pendulum. (a) False (b) True
5. 5.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) yes, much faster (c) no, hardly at all (d) it stops swinging
6. 6.⚖️ 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 change it (c) we keep it the same
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the weight of the bob (c) time for 10 swings
8. 8.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much faster (c) much slower (d) it cannot swing
9. 9.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
10. 10.🔮 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 stays the same (d) it doubles
11. 11.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
12. 12.⚖️ 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) how far we pull it back (c) the same hook (d) the string length
13. 13.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 16 seconds?
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a stopwatch (c) a pencil and tape (d) a string
15. 15.⚖️ 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
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the same hook
17. 17.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) magnetism (c) the string (d) the wind
18. 18.⚖️ 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
19. 19.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a heavy brick (d) a sharp tool
20. 20.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
21. 21.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a mirror (c) yeast (d) a magnet
22. 22.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) a heavy nut or washer (d) turmeric powder
23. 23.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a pencil and tape (c) a string (d) a stopwatch
24. 24.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
25. 25.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
26. 26.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a stopwatch (c) a mirror (d) a magnet
27. 27.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
28. 28.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a ruler (d) a balloon
30. 30.True or false: a mirror is not needed for the pendulum. (a) True (b) False
31. 31.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) 10 is a lucky number (c) one swing is too slow (d) it is more accurate
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a heavy nut or washer (c) a ruler (d) a pencil and tape
33. 33.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
34. 34.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) quicker (d) slower
35. 35.True or false: a ruler is not needed for the pendulum. (a) False (b) True
36. 36.True or false: a magnet is needed for the pendulum. (a) False (b) True
37. 37.⚖️ 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
38. 38.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a digital watch (c) a grandfather clock (d) a sundial
39. 39.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a shorter string (c) a lighter bob (d) a heavier bob
40. 40.⚖️ 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

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