Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 377 · 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 ruler is needed for the pendulum. (a) False (b) True
2. 2.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a lighter bob (c) a heavier bob (d) a shorter string
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a magnet (c) a string (d) a stopwatch
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a ruler (d) yeast
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a balloon (d) a pencil and tape
6. 6.🧺 Which of these is needed for the pendulum? (a) yeast (b) a mirror (c) a magnet (d) a pencil and tape
7. 7.True or false: yeast is needed for the pendulum. (a) False (b) True
8. 8.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
9. 9.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
10. 10.True or false: a balloon is needed for the pendulum. (a) False (b) True
11. 11.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) yes, much faster (c) it stops swinging (d) no, hardly at all
12. 12.True or false: a magnet is needed for the pendulum. (a) True (b) False
13. 13.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
14. 14.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) magnetism (c) the string (d) gravity
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a mirror (c) a string (d) a ruler
16. 16.🕰️ 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) 10 is a lucky number (d) it is more accurate
17. 17.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a string (d) a balloon
18. 18.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it stays the same (c) it becomes 4 times (d) it doubles
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the weight of the bob
20. 20.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
21. 21.⚖️ 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) how far we pull it back (c) the string length
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) the weight of the bob (c) how far we pull it back (d) time for 10 swings
23. 23.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
24. 24.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
25. 25.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a small nut or washer (d) a heavy brick
26. 26.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
27. 27.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) turmeric powder (c) a ruler (d) a balloon
28. 28.⚖️ 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 string length (c) the same hook (d) how far we pull it back
29. 29.⚖️ 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 keep it the same (c) we measure it
30. 30.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) it is hot (d) the bob could hit you
31. 31.⚖️ 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
32. 32.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 20 seconds?
33. 33.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) much slower (d) about the same
34. 34.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
35. 35.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
36. 36.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
37. 37.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
38. 38.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) turmeric powder (d) a pencil and tape
40. 40.⚖️ 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

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