Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 453 · 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.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.🧺 Which of these is needed for the pendulum? (a) a string (b) a battery cell (c) turmeric powder (d) a magnet
3. 3.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 30 seconds?
4. 4.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) it stops swinging (c) no, hardly at all (d) yes, much faster
5. 5.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is magnetic (d) it is hot
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) False (b) True
7. 7.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a mirror (c) a stopwatch (d) a pencil and tape
8. 8.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a longer string (d) a heavier bob
9. 9.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
10. 10.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it doubles (d) it stays the same
11. 11.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the string (c) magnetism (d) the wind
12. 12.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
13. 13.⚖️ 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
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) how far we pull it back (c) the same hook (d) time for 10 swings
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we change it (c) we measure it
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) how far we pull it back (c) time for 10 swings (d) the string length
17. 17.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a stopwatch (c) a mirror (d) turmeric powder
18. 18.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a heavy brick (c) a glass bottle (d) a sharp tool
19. 19.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 34 seconds?
20. 20.True or false: yeast is needed for the pendulum. (a) True (b) False
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a pencil and tape (c) a mirror (d) a ruler
22. 22.⚖️ 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
23. 23.🧺 Which of these is needed for the pendulum? (a) a balloon (b) yeast (c) a pencil and tape (d) a magnet
24. 24.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we measure it (c) we change it
26. 26.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
27. 27.⚖️ 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) True (b) False
28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a ruler (c) a heavy nut or washer (d) a string
29. 29.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) it cannot swing (c) about the same (d) much faster
30. 30.True or false: a mirror is needed for the pendulum. (a) True (b) False
31. 31.True or false: a mirror is not needed for the pendulum. (a) False (b) True
32. 32.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) quicker (d) slower
33. 33.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a heavy nut or washer (d) yeast
35. 35.True or false: a magnet is not needed for the pendulum. (a) True (b) False
36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is kept the same. (a) True (b) False
37. 37.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
38. 38.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 38 seconds?
39. 39.True or false: a stopwatch 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: the same hook is what we measure. (a) False (b) True

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