Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 481 · 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.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the wind (d) the string
2. 2.⚖️ 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
3. 3.⚖️ 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
4. 4.🔮 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 halves (d) it stays the same
5. 5.⚖️ 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 measure it (b) we change it (c) we keep it the same
6. 6.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a small nut or washer (d) a sharp tool
7. 7.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) it is wet (d) the bob could hit you
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) turmeric powder (d) a ruler
9. 9.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
10. 10.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a string (c) a magnet (d) a balloon
11. 11.⚖️ 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) True (b) False
12. 12.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) much faster (d) it cannot swing
13. 13.⚖️ 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
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a string (d) a magnet
15. 15.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a lighter bob (c) a shorter string (d) a heavier bob
16. 16.⚖️ 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) True (b) False
17. 17.True or false: a balloon is needed for the pendulum. (a) False (b) True
18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a mirror (c) a stopwatch (d) a ruler
19. 19.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) no, hardly at all (c) it stops swinging (d) yes, much faster
20. 20.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
21. 21.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more fun (c) 10 is a lucky number (d) it is more accurate
22. 22.⚖️ 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) the string length (c) how far we pull it back (d) the same hook
23. 23.True or false: a battery cell is needed for the pendulum. (a) True (b) False
24. 24.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) a magnet (c) a balloon (d) yeast
25. 25.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) the string length (c) time for 10 swings
27. 27.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 39 seconds?
28. 28.⚖️ 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
29. 29.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) turmeric powder (c) a string (d) a ruler
30. 30.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
31. 31.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
32. 32.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) heavier (d) stopped
33. 33.⚖️ 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) False (b) True
34. 34.True or false: a mirror is needed for the pendulum. (a) True (b) False
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a battery cell (c) a stopwatch (d) a heavy nut or washer
36. 36.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 12 seconds?
37. 37.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
38. 38.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
39. 39.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
40. 40.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?

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