Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 213 · 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.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a stopwatch (c) a heavy nut or washer (d) a string
2. 2.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
3. 3.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 24 seconds?
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a string (d) yeast
5. 5.🛟 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
6. 6.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a battery cell (c) a ruler (d) a pencil and tape
8. 8.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
9. 9.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) heavier (d) stopped
10. 10.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a heavier bob (c) a shorter string (d) a lighter bob
11. 11.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
12. 12.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) yeast (c) a pencil and tape (d) a heavy nut or washer
13. 13.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a grandfather clock (d) a phone
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) the same hook (c) time for 10 swings (d) the string length
15. 15.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
16. 16.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a battery cell (c) a stopwatch (d) a magnet
17. 17.⚖️ 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 keep it the same (c) we measure it
18. 18.True or false: a mirror is not needed for the pendulum. (a) False (b) True
19. 19.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
20. 20.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
21. 21.⚖️ 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) False (b) True
22. 22.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
23. 23.🕰️ 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
24. 24.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it doubles (d) it becomes 4 times
25. 25.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a battery cell (c) turmeric powder (d) a string
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) False (b) True
27. 27.⚖️ 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
28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) a magnet (d) a string
29. 29.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a balloon (c) a stopwatch (d) a string
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we change it (c) we keep it the same
32. 32.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a battery cell (c) a heavy nut or washer (d) yeast
33. 33.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a string (d) turmeric powder
34. 34.True or false: yeast is not needed for the pendulum. (a) True (b) False
35. 35.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a ruler (d) a mirror
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is the one thing we change. (a) True (b) False
38. 38.⚖️ 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 same hook (c) the string length
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) False (b) True
40. 40.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) the string (c) gravity (d) magnetism

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