Simple Pendulum Experiment Worksheet

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

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