Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 770 · 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.True or false: a mirror is needed for the pendulum. (a) False (b) True
2. 2.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a balloon (c) yeast (d) turmeric powder
3. 3.⚖️ 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) time for 10 swings (c) the string length
4. 4.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a small nut or washer (c) a glass bottle (d) a sharp tool
5. 5.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
6. 6.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a magnet (c) a ruler (d) a string
8. 8.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 12 seconds?
9. 9.⚖️ 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
10. 10.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the wind (c) the string (d) gravity
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) the weight of the bob (c) how far we pull it back (d) time for 10 swings
12. 12.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
13. 13.True or false: a balloon is needed for the pendulum. (a) False (b) True
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a stopwatch (c) a ruler (d) a string
16. 16.True or false: a ruler is needed for the pendulum. (a) True (b) False
17. 17.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) a pencil and tape (d) yeast
18. 18.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 11 seconds?
19. 19.⚖️ 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) time for 10 swings (c) the string length (d) how far we pull it back
20. 20.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is wet (d) it is magnetic
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) False (b) True
22. 22.🔮 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 doubles (d) it becomes 4 times
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a string (d) yeast
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a pencil and tape (c) a string (d) a heavy nut or washer
25. 25.⚖️ 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) True (b) False
26. 26.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
27. 27.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
28. 28.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
29. 29.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
30. 30.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a shorter string (c) a longer string (d) a heavier bob
31. 31.⚖️ 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 keep it the same (c) we measure it
32. 32.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) a heavy nut or washer (d) a magnet
33. 33.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) heavier (c) stopped (d) slower
34. 34.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
35. 35.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) one swing is too slow (c) it is more fun (d) it is more accurate
36. 36.⚖️ 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
37. 37.⚖️ 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
38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) how far we pull it back (c) time for 10 swings
39. 39.True or false: yeast is needed for the pendulum. (a) True (b) False
40. 40.⚖️ 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 keep it the same (c) we measure it

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