Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 901 · 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.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
2. 2.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a pencil and tape (c) a ruler (d) a heavy nut or washer
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) False (b) True
4. 4.⚖️ 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) True (b) False
5. 5.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a shorter string (d) a longer string
6. 6.True or false: a ruler is not needed for the pendulum. (a) False (b) True
7. 7.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) a string (d) a balloon
8. 8.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) 10 is a lucky number (c) it is more fun (d) it is more accurate
9. 9.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) about the same (d) much faster
10. 10.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
11. 11.⚖️ 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) time for 10 swings (c) how far we pull it back (d) the string length
12. 12.⚖️ 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
13. 13.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a digital watch (d) a sundial
14. 14.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 17 seconds?
15. 15.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) a magnet (d) a pencil and tape
16. 16.True or false: yeast is needed for the pendulum. (a) True (b) False
17. 17.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is magnetic (d) it is wet
18. 18.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a stopwatch (d) turmeric powder
20. 20.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
21. 21.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it becomes 4 times (d) it doubles
22. 22.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a ruler (c) a string (d) a pencil and tape
23. 23.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
24. 24.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?
25. 25.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) it stops swinging (c) no, hardly at all (d) yes, much slower
26. 26.True or false: a battery cell is needed for the pendulum. (a) False (b) True
27. 27.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 36 seconds?
28. 28.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
29. 29.⚖️ 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
30. 30.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 14 seconds?
31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a magnet (c) a ruler (d) a stopwatch
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a pencil and tape (d) a battery cell
33. 33.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) quicker (d) heavier
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
35. 35.⚖️ 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
36. 36.⚖️ 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
37. 37.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
38. 38.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) the same hook (c) how far we pull it back (d) time for 10 swings
40. 40.True or false: a balloon is needed for the pendulum. (a) True (b) False

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