Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 136 · 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.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
2. 2.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a balloon (c) a string (d) a mirror
3. 3.True or false: a magnet is needed for the pendulum. (a) True (b) False
4. 4.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it doubles (d) it halves
5. 5.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a heavier bob (d) a longer string
6. 6.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) no, hardly at all (c) it stops swinging (d) yes, much slower
7. 7.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
8. 8.⚖️ 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
9. 9.True or false: a string is not needed for the pendulum. (a) False (b) True
10. 10.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
11. 11.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
12. 12.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the same hook
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) how far we pull it back (c) the same hook (d) time for 10 swings
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a ruler (d) a magnet
16. 16.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) heavier (d) stopped
17. 17.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) the bob could hit you (d) it is hot
18. 18.True or false: a balloon is needed for the pendulum. (a) True (b) False
19. 19.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a heavy nut or washer (c) turmeric powder (d) a battery cell
20. 20.⚖️ 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
21. 21.⚖️ 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
22. 22.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a balloon (d) a stopwatch
24. 24.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) much faster (d) about the same
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.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a small nut or washer (d) a sharp tool
27. 27.⚖️ 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 measure it (c) we keep it the same
28. 28.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
29. 29.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
30. 30.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) a mirror (d) a stopwatch
31. 31.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a magnet (c) a string (d) a ruler
32. 32.⚖️ 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) the weight of the bob (c) how far we pull it back (d) the same hook
33. 33.True or false: yeast is needed for the pendulum. (a) True (b) False
34. 34.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 24 seconds?
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) turmeric powder (c) a string (d) a pencil and tape
36. 36.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
37. 37.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
38. 38.⚖️ 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
39. 39.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a pencil and tape (c) a magnet (d) yeast
40. 40.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) gravity (c) the string (d) magnetism

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