Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 712 · 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 45 seconds. How many seconds does one swing take?
2. 2.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a stopwatch (c) a magnet (d) yeast
3. 3.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a glass bottle (d) a small nut or washer
4. 4.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
5. 5.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 20 seconds?
6. 6.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) yeast (c) a balloon (d) a pencil and tape
7. 7.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
8. 8.⚖️ 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
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
10. 10.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a digital watch (d) a grandfather clock
11. 11.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) the bob could hit you (d) it is magnetic
12. 12.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) gravity (d) the wind
13. 13.True or false: a ruler is needed for the pendulum. (a) True (b) False
14. 14.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
15. 15.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
16. 16.🧺 Which of these is needed for the pendulum? (a) a ruler (b) a balloon (c) a battery cell (d) turmeric powder
17. 17.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
18. 18.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we keep it the same (c) we change it
20. 20.🕰️ 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
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a stopwatch (d) turmeric powder
22. 22.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
23. 23.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
24. 24.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
25. 25.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it doubles (d) it halves
26. 26.⚖️ 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) the same hook
27. 27.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) turmeric powder (c) a ruler (d) a string
28. 28.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
29. 29.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
30. 30.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) much faster (c) about the same (d) it cannot swing
31. 31.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) stopped (d) quicker
32. 32.⚖️ 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
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a stopwatch (d) a mirror
35. 35.⚖️ 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
36. 36.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a pencil and tape (d) a balloon
38. 38.⚖️ 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 string length (c) the same hook
39. 39.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
40. 40.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a heavy nut or washer (c) a stopwatch (d) a string

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