Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 14 · 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 balloon for the pendulum? (a) needed (b) not needed
2. 2.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 30 seconds?
3. 3.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) a battery cell (d) a string
4. 4.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
5. 5.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
6. 6.⚖️ 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 change it (c) we keep it the same
7. 7.True or false: a battery cell is needed for the pendulum. (a) False (b) True
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) the same hook (c) the weight of the bob (d) time for 10 swings
9. 9.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) about the same (c) much slower (d) much faster
10. 10.⚖️ 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 string length (c) the weight of the bob (d) the same hook
11. 11.⚖️ 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
12. 12.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
13. 13.True or false: a mirror is needed for the pendulum. (a) False (b) True
14. 14.⚖️ 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) False (b) True
15. 15.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
16. 16.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) a battery cell (d) a string
17. 17.⚖️ 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
18. 18.True or false: a ruler is needed for the pendulum. (a) True (b) False
19. 19.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
20. 20.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 26 seconds?
21. 21.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it becomes 4 times (c) it halves (d) it stays the same
22. 22.⚖️ 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
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a heavy nut or washer (c) a pencil and tape (d) a stopwatch
24. 24.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a shorter string (d) a longer string
25. 25.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a glass bottle (d) a small nut or washer
26. 26.True or false: yeast is needed for the pendulum. (a) True (b) False
27. 27.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a mirror (c) yeast (d) a magnet
28. 28.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
29. 29.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) yeast (c) a magnet (d) turmeric powder
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we keep it the same (c) we measure it
31. 31.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
32. 32.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) stopped (d) quicker
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) False (b) True
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) False (b) True
35. 35.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a digital watch (c) a grandfather clock (d) a sundial
36. 36.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
37. 37.⚖️ 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 measure it (c) we keep it the same
38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we change it (c) we measure it
39. 39.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 36 seconds?
40. 40.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 42 seconds?

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