Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 348 · 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 needed for the pendulum? (a) a magnet (b) a mirror (c) a balloon (d) a heavy nut or washer
2. 2.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) slower (d) quicker
3. 3.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) much faster (c) about the same (d) it cannot swing
4. 4.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
5. 5.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a stopwatch (c) a ruler (d) a heavy nut or washer
7. 7.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) the bob could hit you (d) it is wet
8. 8.⚖️ 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 weight of the bob (c) the string length (d) time for 10 swings
9. 9.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a stopwatch (c) a string (d) a mirror
10. 10.⚖️ 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
11. 11.⚖️ 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 string length (c) the weight of the bob (d) time for 10 swings
12. 12.True or false: a mirror is needed for the pendulum. (a) False (b) True
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) yeast (c) a ruler (d) a stopwatch
15. 15.⚖️ 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
16. 16.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 15 seconds?
17. 17.🛟 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
18. 18.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) False (b) True
20. 20.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
21. 21.⚖️ 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
22. 22.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
23. 23.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
24. 24.⚖️ 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
25. 25.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 11 seconds?
26. 26.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a longer string (d) a shorter string
27. 27.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the weight of the bob (c) time for 10 swings
29. 29.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it becomes 4 times (c) it halves (d) it stays the same
30. 30.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) turmeric powder (c) a magnet (d) a pencil and tape
31. 31.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) the wind (d) gravity
32. 32.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
33. 33.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 19 seconds?
34. 34.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) it stops swinging (c) yes, much slower (d) yes, much faster
35. 35.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 18 seconds?
36. 36.True or false: a string is needed for the pendulum. (a) True (b) False
37. 37.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
38. 38.True or false: a string is not needed for the pendulum. (a) True (b) False
39. 39.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
40. 40.⚖️ 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

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