Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 141 · 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.🧺 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) a magnet
2. 2.⚖️ 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) time for 10 swings (c) the weight of the bob (d) the string length
3. 3.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
4. 4.⚖️ 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) True (b) False
5. 5.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) the bob could hit you (d) it is hot
6. 6.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
7. 7.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) yes, much slower (c) it stops swinging (d) no, hardly at all
8. 8.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) heavier (c) stopped (d) slower
9. 9.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
10. 10.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
11. 11.⚖️ 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
12. 12.🛟 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
13. 13.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
14. 14.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more fun (c) one swing is too slow (d) it is more accurate
15. 15.⚖️ 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
16. 16.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
17. 17.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a magnet (c) a ruler (d) a string
18. 18.⚖️ 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) False (b) True
19. 19.⚖️ 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 measure it (c) we keep it the same
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) the string length (c) the same hook (d) time for 10 swings
21. 21.True or false: a mirror is needed for the pendulum. (a) True (b) False
22. 22.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it halves (c) it doubles (d) it stays the same
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) the string length (c) time for 10 swings
24. 24.True or false: a mirror is not needed for the pendulum. (a) True (b) False
25. 25.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a stopwatch (c) a pencil and tape (d) a heavy nut or washer
26. 26.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) it cannot swing (c) about the same (d) much faster
27. 27.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) magnetism (c) the string (d) gravity
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
29. 29.⚖️ 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 string length (c) the weight of the bob
30. 30.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
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 keep it the same (c) we change it
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) a battery cell (d) a pencil and tape
33. 33.⚖️ 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
34. 34.True or false: a balloon is needed for the pendulum. (a) True (b) False
35. 35.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a ruler (c) a heavy nut or washer (d) turmeric powder
36. 36.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) yeast (c) a heavy nut or washer (d) a stopwatch
38. 38.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
39. 39.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
40. 40.True or false: a stopwatch is needed for the pendulum. (a) False (b) True

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