Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 925 · 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 15 swings in 30 seconds. How many seconds does one swing take?
2. 2.True or false: a battery cell is needed for the pendulum. (a) False (b) True
3. 3.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 11 seconds?
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a mirror (d) a stopwatch
5. 5.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
6. 6.⚖️ 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
7. 7.True or false: a mirror is needed for the pendulum. (a) False (b) True
8. 8.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) a string (d) yeast
10. 10.True or false: a string is not needed for the pendulum. (a) False (b) True
11. 11.⚖️ 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 keep it the same (c) we measure it
12. 12.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
13. 13.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) yeast (c) a mirror (d) a magnet
14. 14.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) the bob could hit you (d) it is hot
15. 15.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
16. 16.⚖️ 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
17. 17.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a shorter string (d) a longer string
18. 18.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 16 seconds?
19. 19.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 7 seconds?
20. 20.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
21. 21.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a pencil and tape (c) a stopwatch (d) a ruler
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) how far we pull it back (c) the weight of the bob (d) time for 10 swings
23. 23.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 28 seconds?
24. 24.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a magnet (c) a string (d) a heavy nut or washer
25. 25.⚖️ 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
26. 26.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a small nut or washer (d) a sharp tool
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a battery cell (d) a ruler
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the same hook (b) time for 10 swings (c) the weight of the bob (d) the string length
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a balloon (c) a string (d) a pencil and tape
30. 30.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a pencil and tape (c) a string (d) a battery cell
31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a magnet (d) a string
32. 32.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 8 seconds?
33. 33.True or false: a ruler is not needed for the pendulum. (a) False (b) True
34. 34.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) magnetism (c) the string (d) the wind
35. 35.⚖️ 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 change it (b) we measure it (c) we keep it the same
36. 36.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) it stops swinging (c) yes, much slower (d) no, hardly at all
37. 37.🕰️ 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
38. 38.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 57 seconds?
39. 39.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a balloon (c) a stopwatch (d) a string
40. 40.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) stopped (c) slower (d) heavier

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