Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 160 · 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.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
2. 2.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a heavy nut or washer (c) a battery cell (d) turmeric powder
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we measure it (c) we keep it the same
4. 4.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) about the same (c) much slower (d) it cannot swing
5. 5.⚖️ 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
6. 6.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is wet (d) it is magnetic
7. 7.⚖️ 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 change it (c) we measure it
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 weight of the bob (c) the string length
9. 9.⚖️ 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 change it (c) we keep it the same
10. 10.⚖️ 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) how far we pull it back (c) the weight of the bob (d) the string length
11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) yeast (c) a stopwatch (d) a ruler
12. 12.🕰️ 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
13. 13.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
14. 14.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a balloon (d) a heavy nut or washer
16. 16.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) slower (d) heavier
17. 17.⚖️ 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) the string length (c) the same hook (d) time for 10 swings
18. 18.True or false: a magnet is not needed for the pendulum. (a) True (b) False
19. 19.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
20. 20.⚖️ 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 same hook (c) time for 10 swings
21. 21.🕰️ 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
22. 22.True or false: a ruler is not needed for the pendulum. (a) False (b) True
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a ruler (c) a stopwatch (d) a string
24. 24.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
25. 25.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the wind (c) gravity (d) the string
26. 26.⚖️ 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
27. 27.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 12 seconds?
28. 28.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a glass bottle (d) a small nut or washer
29. 29.True or false: a battery cell is needed for the pendulum. (a) False (b) True
30. 30.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
31. 31.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a pencil and tape (c) yeast (d) a magnet
32. 32.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a longer string (c) a shorter string (d) a heavier bob
33. 33.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
34. 34.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
35. 35.⚖️ 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
36. 36.True or false: yeast is not needed for the pendulum. (a) False (b) True
37. 37.⚖️ 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
38. 38.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
40. 40.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) yeast (d) a pencil and tape

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