Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 582 · 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 pencil and tape (b) yeast (c) a heavy nut or washer (d) a string
2. 2.⚖️ 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
3. 3.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a heavy brick (d) a small nut or washer
4. 4.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a battery cell (c) a string (d) a magnet
5. 5.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) heavier (d) stopped
6. 6.⚖️ 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) True (b) False
7. 7.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 18 seconds?
8. 8.⚖️ 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 change it (c) we keep it the same
9. 9.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) the bob could hit you (d) it is magnetic
10. 10.True or false: yeast 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: the same hook is what we measure. (a) False (b) True
12. 12.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
13. 13.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it stays the same (c) it doubles (d) it becomes 4 times
14. 14.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
15. 15.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a magnet (c) yeast (d) turmeric powder
16. 16.⚖️ 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) how far we pull it back (c) the string length (d) time for 10 swings
17. 17.⚖️ 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) False (b) True
18. 18.🕰️ 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) 10 is a lucky number (d) it is more fun
19. 19.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 60 seconds?
20. 20.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a longer string (d) a lighter bob
21. 21.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a stopwatch (c) a battery cell (d) a balloon
22. 22.🕰️ 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
23. 23.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
24. 24.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
25. 25.⚖️ 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
26. 26.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 24 seconds?
27. 27.True or false: a ruler is needed for the pendulum. (a) False (b) True
28. 28.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
29. 29.⚖️ 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
30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a mirror (c) a heavy nut or washer (d) a string
31. 31.⚖️ 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 measure it (b) we keep it the same (c) we change it
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a battery cell (c) a stopwatch (d) a heavy nut or washer
33. 33.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
34. 34.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 16 seconds?
35. 35.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 19 seconds?
36. 36.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 8 seconds?
37. 37.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a phone (d) a grandfather clock
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a magnet (c) a pencil and tape (d) a stopwatch
39. 39.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
40. 40.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True

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