Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 448 · 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.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) gravity (d) the wind
2. 2.⚖️ 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
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we keep it the same (c) we change it
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) the same hook (c) time for 10 swings (d) the weight of the bob
5. 5.⚖️ 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) False (b) True
6. 6.⚖️ 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) how far we pull it back (c) the string length
7. 7.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a string (c) a ruler (d) a heavy nut or washer
8. 8.⚖️ 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 change it (c) we measure it
9. 9.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 11 seconds?
10. 10.⚖️ 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
11. 11.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
12. 12.True or false: a string is not needed for the pendulum. (a) True (b) False
13. 13.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it becomes 4 times (c) it stays the same (d) it halves
14. 14.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
15. 15.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a shorter string (d) a lighter bob
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) a pencil and tape (d) turmeric powder
17. 17.True or false: yeast is not needed for the pendulum. (a) False (b) True
18. 18.True or false: a balloon is not needed for the pendulum. (a) False (b) True
19. 19.🧺 Which of these is needed for the pendulum? (a) yeast (b) a mirror (c) a stopwatch (d) a balloon
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) a battery cell (d) a stopwatch
21. 21.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
22. 22.🧺 Which of these is not needed for the pendulum? (a) a string (b) a heavy nut or washer (c) a balloon (d) a ruler
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) True (b) False
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) the string length (c) time for 10 swings
25. 25.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
26. 26.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) quicker (d) slower
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a pencil and tape (d) a balloon
28. 28.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is hot (d) it is wet
29. 29.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a heavy brick (d) a small nut or washer
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 change it (b) we keep it the same (c) we measure it
31. 31.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
32. 32.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
33. 33.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) 10 is a lucky number (c) it is more accurate (d) it is more fun
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) how far we pull it back (b) the string length (c) the same hook (d) the weight of the bob
35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) the string length (c) time for 10 swings
36. 36.True or false: a balloon is needed for the pendulum. (a) False (b) True
37. 37.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
38. 38.True or false: a ruler is needed for the pendulum. (a) False (b) True
39. 39.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True

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