Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 466 · 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.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is magnetic (c) it is wet (d) it is hot
2. 2.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
3. 3.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
4. 4.True or false: a battery cell is needed for the pendulum. (a) False (b) True
5. 5.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a sundial (d) a phone
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) time for 10 swings (c) the weight of the bob (d) how far we pull it back
7. 7.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
8. 8.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much faster (c) no, hardly at all (d) yes, much slower
9. 9.⚖️ 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 change it (c) we measure it
10. 10.True or false: a balloon is not needed for the pendulum. (a) False (b) True
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) True (b) False
12. 12.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
13. 13.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 14 seconds?
14. 14.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
15. 15.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the weight of the bob
17. 17.🧺 Which of these is not needed for the pendulum? (a) a string (b) a heavy nut or washer (c) a balloon (d) a ruler
18. 18.🧺 Which of these is needed for the pendulum? (a) yeast (b) a battery cell (c) turmeric powder (d) a string
19. 19.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more fun (c) it is more accurate (d) 10 is a lucky number
20. 20.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) quicker (c) slower (d) stopped
21. 21.⚖️ 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
22. 22.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) a mirror (d) a string
23. 23.True or false: a string is needed for the pendulum. (a) False (b) True
24. 24.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) a battery cell (d) a stopwatch
25. 25.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) about the same (c) it cannot swing (d) much slower
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we measure it (c) we keep it the same
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) a battery cell (d) a stopwatch
28. 28.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) True (b) False
30. 30.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a pencil and tape (c) a heavy nut or washer (d) a string
32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the same hook (b) the string length (c) time for 10 swings (d) the weight of the bob
33. 33.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 48 seconds?
34. 34.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a stopwatch (c) turmeric powder (d) a string
35. 35.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
36. 36.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a sharp tool (c) a glass bottle (d) a heavy brick
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a stopwatch (c) a pencil and tape (d) a ruler
38. 38.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it stays the same (d) it becomes 4 times
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a mirror (d) a pencil and tape
40. 40.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?

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