Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 192 · 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 mirror for the pendulum? (a) needed (b) not needed
2. 2.⚖️ 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 same hook (c) the string length
3. 3.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 45 seconds?
4. 4.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a grandfather clock (d) a digital watch
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a string (d) a magnet
6. 6.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) yeast (d) a heavy nut or washer
10. 10.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a ruler (c) a stopwatch (d) yeast
11. 11.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
12. 12.⚖️ 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) time for 10 swings (d) the string length
13. 13.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) heavier (d) stopped
14. 14.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more accurate (c) it is more fun (d) 10 is a lucky number
15. 15.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
16. 16.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) turmeric powder (c) a stopwatch (d) a mirror
17. 17.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) no, hardly at all (c) it stops swinging (d) yes, much faster
18. 18.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 20 seconds?
19. 19.⚖️ 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
20. 20.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
21. 21.⚖️ 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
22. 22.🔮 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
23. 23.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 48 seconds?
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we change it (c) we measure it
25. 25.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it stays the same (c) it halves (d) it becomes 4 times
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a balloon (c) a ruler (d) a pencil and tape
27. 27.⚖️ 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
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) the same hook (c) how far we pull it back (d) time for 10 swings
29. 29.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a heavy brick (d) a glass bottle
30. 30.⚖️ 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
31. 31.⚖️ 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
32. 32.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
33. 33.True or false: yeast is needed for the pendulum. (a) False (b) True
34. 34.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a magnet (c) a battery cell (d) a string
35. 35.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) True (b) False
37. 37.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
38. 38.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 51 seconds?
39. 39.True or false: a magnet is needed for the pendulum. (a) False (b) True
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is the one thing we change. (a) False (b) True

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