Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 355 · 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 mirror (b) a magnet (c) a balloon (d) a heavy nut or washer
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) the string length (c) the weight of the bob (d) the same hook
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) the string length (c) time for 10 swings
4. 4.⚖️ 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
5. 5.🧺 Which of these is not needed for the pendulum? (a) a string (b) a heavy nut or washer (c) a stopwatch (d) a magnet
6. 6.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
7. 7.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) a battery cell (d) a pencil and tape
8. 8.True or false: a ruler is needed for the pendulum. (a) True (b) False
9. 9.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 9 seconds?
10. 10.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) the same hook (c) the weight of the bob (d) time for 10 swings
12. 12.🛟 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
13. 13.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 19 seconds?
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a stopwatch (d) yeast
15. 15.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
16. 16.True or false: a mirror is needed for the pendulum. (a) False (b) True
17. 17.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is hot (d) it is wet
18. 18.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a pencil and tape (c) a balloon (d) a magnet
19. 19.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
20. 20.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it doubles (c) it stays the same (d) it halves
21. 21.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 10 seconds?
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we measure it (c) we change it
23. 23.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) magnetism (c) gravity (d) the string
24. 24.⚖️ 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 same hook (c) the string length
25. 25.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a balloon (c) a heavy nut or washer (d) a string
27. 27.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) it stops swinging (c) yes, much faster (d) yes, much slower
28. 28.True or false: a battery cell is needed for the pendulum. (a) False (b) True
29. 29.⚖️ 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
30. 30.🧺 Which of these is needed for the pendulum? (a) a ruler (b) a battery cell (c) a mirror (d) a magnet
31. 31.⚖️ 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) False (b) True
32. 32.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 27 seconds?
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we measure it (c) we keep it the same
34. 34.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) it cannot swing (d) about the same
35. 35.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 12 seconds?
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a battery cell (d) a pencil and tape
37. 37.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more fun (c) it is more accurate (d) one swing is too slow
38. 38.True or false: yeast is not needed for the pendulum. (a) False (b) True
39. 39.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
40. 40.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed

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