Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 106 · 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.⚖️ 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) the weight of the bob (c) the string length (d) the same hook
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) time for 10 swings (c) how far we pull it back (d) the same hook
3. 3.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a pencil and tape (c) a heavy nut or washer (d) a ruler
4. 4.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) about the same (c) much slower (d) much faster
5. 5.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
6. 6.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
7. 7.⚖️ 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
8. 8.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) it is hot (d) the bob could hit you
9. 9.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a ruler (c) a pencil and tape (d) a string
11. 11.⚖️ 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) True (b) False
12. 12.⚖️ 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
13. 13.⚖️ 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 measure it (c) we change it
14. 14.⚖️ 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) True (b) False
15. 15.🧺 Which of these is not needed for the pendulum? (a) a string (b) a stopwatch (c) turmeric powder (d) a heavy nut or washer
16. 16.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the wind (c) magnetism (d) the string
17. 17.True or false: a battery cell is needed for the pendulum. (a) False (b) True
18. 18.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a battery cell (c) a string (d) a pencil and tape
19. 19.🧺 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) a ruler (d) yeast
20. 20.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
21. 21.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) a battery cell (d) a string
22. 22.True or false: a magnet is needed for the pendulum. (a) False (b) True
23. 23.🧺 Which of these is needed for the pendulum? (a) yeast (b) a mirror (c) a stopwatch (d) turmeric powder
24. 24.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
25. 25.⚖️ 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
26. 26.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
27. 27.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
28. 28.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a glass bottle (d) a small nut or washer
29. 29.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) True (b) False
31. 31.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a heavy nut or washer (c) a stopwatch (d) a pencil and tape
33. 33.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
34. 34.⚖️ 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
35. 35.🕰️ 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
36. 36.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
37. 37.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a longer string (d) a lighter bob
38. 38.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) yeast (c) a magnet (d) a balloon
39. 39.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) quicker (d) slower
40. 40.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it halves (d) it doubles

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