Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 470 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) a heavy nut or washer (d) yeast
2. 2.⚖️ 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 measure it (c) we keep it the same
3. 3.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
4. 4.🕰️ 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
5. 5.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
6. 6.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is hot (c) the bob could hit you (d) it is magnetic
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) False (b) True
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) the weight of the bob (c) the same hook (d) the string length
9. 9.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
10. 10.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
11. 11.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a longer string (d) a lighter bob
12. 12.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
13. 13.⚖️ 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
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a ruler (d) a balloon
15. 15.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
16. 16.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
17. 17.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a pencil and tape (d) a balloon
18. 18.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) heavier (d) stopped
19. 19.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 19 seconds?
20. 20.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) it cannot swing (d) much faster
21. 21.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) a ruler (d) turmeric powder
22. 22.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) no, hardly at all (c) yes, much faster (d) yes, much slower
23. 23.⚖️ 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 string length (c) how far we pull it back
24. 24.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
25. 25.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a digital watch (c) a phone (d) a sundial
26. 26.True or false: yeast is needed for the pendulum. (a) True (b) False
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we measure it (c) we change it
28. 28.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
29. 29.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a battery cell (c) a string (d) a ruler
31. 31.⚖️ 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
32. 32.🛟 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
33. 33.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) a heavy nut or washer (d) a mirror
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a magnet (d) a heavy nut or washer
35. 35.⚖️ 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
36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) the string length (c) time for 10 swings (d) how far we pull it back
37. 37.🔮 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
38. 38.⚖️ 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
39. 39.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
40. 40.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?

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