Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 187 · 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.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) the weight of the bob (c) time for 10 swings (d) the string length
3. 3.⚖️ 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 keep it the same (c) we change it
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a mirror (c) a heavy nut or washer (d) a ruler
5. 5.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a sharp tool (c) a heavy brick (d) a glass bottle
6. 6.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
7. 7.True or false: yeast is needed for the pendulum. (a) True (b) False
8. 8.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) heavier (c) slower (d) stopped
9. 9.⚖️ 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
10. 10.⚖️ 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
11. 11.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a magnet (c) a string (d) a heavy nut or washer
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we change it (c) we measure it
13. 13.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it doubles (c) it stays the same (d) it becomes 4 times
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a balloon (d) a pencil and tape
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a ruler (d) a magnet
16. 16.True or false: a balloon is not needed for the pendulum. (a) False (b) True
17. 17.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) gravity (c) the string (d) magnetism
18. 18.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a longer string (d) a lighter bob
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) yeast (d) a ruler
20. 20.⚖️ 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
21. 21.True or false: a mirror is not needed for the pendulum. (a) False (b) True
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) how far we pull it back (c) time for 10 swings (d) the same hook
23. 23.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is hot (c) it is magnetic (d) the bob could hit you
24. 24.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a battery cell (c) a mirror (d) a balloon
25. 25.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) about the same (c) it cannot swing (d) much slower
26. 26.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) a battery cell (c) a balloon (d) a magnet
27. 27.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
28. 28.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
29. 29.True or false: a string is not needed for the pendulum. (a) False (b) True
30. 30.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) a string (d) a magnet
31. 31.🕰️ 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 fun (d) it is more accurate
32. 32.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 48 seconds?
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is the one thing we change. (a) False (b) True
34. 34.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
35. 35.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
36. 36.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
37. 37.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a pencil and tape (c) a heavy nut or washer (d) a string
38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
39. 39.⚖️ 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) False (b) True
40. 40.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 24 seconds?

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