Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 7 · 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.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
3. 3.True or false: a magnet is not needed for the pendulum. (a) False (b) True
4. 4.⚖️ 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) True (b) False
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
6. 6.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “how far we pull it back”? (a) we keep it the same (b) we measure it (c) we change it
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.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a heavy brick (c) a sharp tool (d) a glass bottle
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) the string length (c) time for 10 swings
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 change it (b) we measure it (c) we keep it the same
12. 12.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is hot (d) it is magnetic
13. 13.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a longer string (c) a heavier bob (d) a shorter string
14. 14.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) heavier (d) quicker
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) the weight of the bob (c) the string length (d) the same hook
16. 16.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 6 seconds?
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a battery cell (c) a ruler (d) a stopwatch
18. 18.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a heavy nut or washer (c) a mirror (d) a balloon
19. 19.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
20. 20.⚖️ 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
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is the one thing we change. (a) True (b) False
22. 22.⚖️ 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
23. 23.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it doubles (c) it becomes 4 times (d) it stays the same
24. 24.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) yeast (d) a stopwatch
26. 26.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much faster (c) it cannot swing (d) much slower
27. 27.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
28. 28.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
29. 29.🕰️ 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
30. 30.⚖️ 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) True (b) False
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) False (b) True
32. 32.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a pencil and tape (c) a stopwatch (d) a battery cell
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a stopwatch (c) a string (d) a heavy nut or washer
34. 34.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
35. 35.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 33 seconds?
36. 36.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
37. 37.True or false: a magnet is needed for the pendulum. (a) True (b) False
38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we keep it the same (c) we change it
39. 39.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) the string (c) magnetism (d) gravity
40. 40.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 7 seconds?

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