Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 339 · 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.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) it is wet (d) the bob could hit you
2. 2.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a ruler (d) a mirror
3. 3.True or false: a magnet is needed for the pendulum. (a) True (b) False
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
5. 5.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it becomes 4 times (d) it stays the same
6. 6.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
7. 7.⚖️ 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
8. 8.True or false: a string is needed for the pendulum. (a) False (b) True
9. 9.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 8 seconds?
10. 10.🧺 Which of these is needed for the pendulum? (a) a string (b) a magnet (c) a mirror (d) a balloon
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we keep it the same (c) we change it
12. 12.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
13. 13.⚖️ 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
14. 14.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
15. 15.⚖️ 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) the weight of the bob (c) time for 10 swings (d) the string length
16. 16.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) one swing is too slow (c) it is more accurate (d) 10 is a lucky number
17. 17.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
18. 18.⚖️ 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) False (b) True
19. 19.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
20. 20.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a longer string (d) a lighter bob
21. 21.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
22. 22.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a magnet (c) yeast (d) a stopwatch
23. 23.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) a string (d) a battery cell
24. 24.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a glass bottle (d) a heavy brick
25. 25.⚖️ 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 same hook (c) time for 10 swings (d) the weight of the bob
26. 26.True or false: yeast is needed for the pendulum. (a) True (b) False
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we keep it the same (c) we measure it
28. 28.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
29. 29.⚖️ 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 change it (c) we keep it the same
30. 30.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) quicker (d) slower
31. 31.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) a heavy nut or washer (d) a battery cell
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a magnet (d) a pencil and tape
33. 33.⚖️ 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
34. 34.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
35. 35.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) a string (d) a magnet
36. 36.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a stopwatch (c) a string (d) a heavy nut or washer
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) yeast (d) a pencil and tape
38. 38.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?
39. 39.⚖️ 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
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a stopwatch (c) a string (d) a ruler

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