Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 889 · 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 mirror (b) yeast (c) a balloon (d) a ruler
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
4. 4.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) it is more accurate (c) 10 is a lucky number (d) one swing is too slow
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) a ruler (d) a battery cell
6. 6.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 15 seconds?
7. 7.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
8. 8.True or false: a string is not needed for the pendulum. (a) False (b) True
9. 9.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a sharp tool (d) a heavy brick
10. 10.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
11. 11.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a stopwatch (c) a balloon (d) yeast
12. 12.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) quicker (d) heavier
13. 13.⚖️ 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) True (b) False
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) False (b) True
15. 15.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a magnet (c) a stopwatch (d) a heavy nut or washer
16. 16.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) about the same (d) much faster
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a ruler (c) a stopwatch (d) a pencil and tape
18. 18.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
19. 19.⚖️ 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 same hook (d) time for 10 swings
20. 20.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a grandfather clock (d) a phone
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a pencil and tape (c) a string (d) a ruler
22. 22.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
23. 23.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a ruler (c) a string (d) a pencil and tape
25. 25.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a heavy nut or washer (c) yeast (d) a balloon
26. 26.🧺 Which of these is needed for the pendulum? (a) a string (b) a magnet (c) a battery cell (d) yeast
27. 27.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
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 weight of the bob (b) time for 10 swings (c) the string length (d) how far we pull it back
29. 29.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) gravity (c) the wind (d) magnetism
30. 30.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
31. 31.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 9 seconds?
32. 32.True or false: a magnet is needed for the pendulum. (a) False (b) True
33. 33.🛟 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
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) yeast (c) a string (d) a pencil and tape
35. 35.True or false: yeast is needed for the pendulum. (a) True (b) False
36. 36.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it doubles (d) it becomes 4 times
37. 37.⚖️ 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) True (b) False
38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we keep it the same (c) we change it
39. 39.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
40. 40.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) yeast (d) a string

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