Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 965 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a mirror (d) a string
2. 2.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a string (d) a battery cell
3. 3.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
4. 4.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
5. 5.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a small nut or washer (d) a glass bottle
6. 6.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a mirror (c) a ruler (d) a stopwatch
7. 7.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a balloon (c) a string (d) a ruler
8. 8.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
9. 9.⚖️ 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 keep it the same (b) we change it (c) we measure it
10. 10.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a lighter bob (d) a longer string
11. 11.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a string (c) a stopwatch (d) a ruler
12. 12.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a mirror (c) yeast (d) turmeric powder
13. 13.⚖️ 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 same hook (c) time for 10 swings (d) the string length
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a string (c) a pencil and tape (d) a ruler
15. 15.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
16. 16.⚖️ 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
17. 17.True or false: a battery cell is needed for the pendulum. (a) False (b) True
18. 18.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much faster (c) much slower (d) it cannot swing
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a battery cell (c) a stopwatch (d) a heavy nut or washer
20. 20.True or false: a balloon is needed for the pendulum. (a) True (b) False
21. 21.🛟 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
22. 22.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 10 seconds?
23. 23.⚖️ 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 weight of the bob (c) the string length
24. 24.🧺 Which of these is needed for the pendulum? (a) a magnet (b) yeast (c) a stopwatch (d) a balloon
25. 25.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
26. 26.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 14 seconds?
27. 27.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) one swing is too slow (c) it is more fun (d) it is more accurate
28. 28.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
29. 29.⚖️ 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
30. 30.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
31. 31.⚖️ 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 keep it the same (c) we measure it
32. 32.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a phone (d) a sundial
33. 33.True or false: a balloon is not needed for the pendulum. (a) False (b) True
34. 34.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it doubles (d) it halves
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a ruler (c) a heavy nut or washer (d) a string
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) yeast (d) a stopwatch
37. 37.True or false: a ruler is needed for the pendulum. (a) True (b) False
38. 38.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) False (b) True
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a magnet (d) a string

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