Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 817 · 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.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a heavy nut or washer (c) a string (d) a pencil and tape
2. 2.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
3. 3.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) yeast (c) a string (d) a pencil and tape
4. 4.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
5. 5.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a balloon (c) yeast (d) a heavy nut or washer
6. 6.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
7. 7.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) it cannot swing (c) about the same (d) much slower
8. 8.⚖️ 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
9. 9.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
10. 10.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
11. 11.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) quicker (d) stopped
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True
13. 13.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
14. 14.True or false: a ruler is needed for the pendulum. (a) True (b) False
15. 15.⚖️ 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) time for 10 swings (c) the weight of the bob (d) the string length
16. 16.⚖️ 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
17. 17.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
18. 18.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a heavy brick (d) a sharp tool
19. 19.True or false: a magnet is not needed for the pendulum. (a) False (b) True
20. 20.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
21. 21.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it doubles (c) it stays the same (d) it halves
22. 22.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much faster (c) yes, much slower (d) no, hardly at all
23. 23.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a stopwatch (c) yeast (d) a battery cell
24. 24.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a longer string (d) a shorter string
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a magnet (d) a stopwatch
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) yeast (d) a string
27. 27.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a mirror (c) a magnet (d) a balloon
28. 28.⚖️ 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
29. 29.⚖️ 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 same hook (c) how far we pull it back (d) the weight of the bob
30. 30.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
31. 31.🕰️ 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) it is more accurate (d) one swing is too slow
32. 32.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a battery cell (c) a magnet (d) a ruler
33. 33.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is hot (d) it is wet
34. 34.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
35. 35.True or false: yeast is not needed for the pendulum. (a) False (b) True
36. 36.⚖️ 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 same hook (c) the string length
37. 37.True or false: a balloon is not needed for the pendulum. (a) False (b) True
38. 38.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) a balloon (d) a pencil and tape
39. 39.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
40. 40.⚖️ 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

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