Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 690 · 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.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
2. 2.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
3. 3.🧺 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
4. 4.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) stopped (c) heavier (d) slower
5. 5.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a heavy nut or washer (d) a balloon
6. 6.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more fun (c) it is more accurate (d) one swing is too slow
7. 7.⚖️ 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
8. 8.True or false: a mirror is not needed for the pendulum. (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) False (b) True
10. 10.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a phone (c) a sundial (d) a grandfather clock
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) how far we pull it back (c) the same hook (d) the string length
12. 12.⚖️ 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
13. 13.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
14. 14.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a stopwatch (c) yeast (d) a string
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) how far we pull it back (b) the weight of the bob (c) the string length (d) time for 10 swings
16. 16.True or false: a string is not needed for the pendulum. (a) False (b) True
17. 17.⚖️ 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 measure it (c) we change it
18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a battery cell (c) a ruler (d) a pencil and tape
19. 19.True or false: a balloon is needed for the pendulum. (a) True (b) False
20. 20.🛟 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
21. 21.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
22. 22.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
23. 23.⚖️ 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 measure it (c) we change it
24. 24.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
25. 25.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it doubles (c) it halves (d) it becomes 4 times
26. 26.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a balloon (c) turmeric powder (d) a string
27. 27.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 30 seconds?
28. 28.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a battery cell (c) yeast (d) a heavy nut or washer
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) False (b) True
30. 30.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
31. 31.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 10 seconds?
32. 32.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) it cannot swing (c) much slower (d) about the same
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.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a shorter string (d) a lighter bob
35. 35.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 20 seconds?
36. 36.True or false: a mirror is needed for the pendulum. (a) True (b) False
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a heavy nut or washer (c) a ruler (d) a pencil and tape
38. 38.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
39. 39.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a pencil and tape (d) a mirror

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