Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 277 · 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 5 swings in 5 seconds. How many seconds does one swing take?
2. 2.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 26 seconds?
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) yeast (d) a ruler
4. 4.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) quicker (d) stopped
5. 5.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a longer string (d) a lighter bob
6. 6.⚖️ 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
7. 7.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is magnetic (d) it is hot
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) the weight of the bob (c) the string length (d) time for 10 swings
9. 9.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a battery cell (c) yeast (d) a stopwatch
10. 10.True or false: a string is not needed for the pendulum. (a) False (b) True
11. 11.⚖️ 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
12. 12.⚖️ 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
13. 13.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) turmeric powder (c) a heavy nut or washer (d) a stopwatch
14. 14.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a heavy brick (d) a glass bottle
15. 15.🧺 Which of these is needed for the pendulum? (a) a ruler (b) a battery cell (c) a magnet (d) a balloon
16. 16.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
17. 17.⚖️ 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
18. 18.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) it is more accurate (c) 10 is a lucky number (d) one swing is too slow
19. 19.True or false: a magnet is not needed for the pendulum. (a) False (b) True
20. 20.⚖️ 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
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
22. 22.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
23. 23.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
24. 24.⚖️ 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) False (b) True
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a heavy nut or washer (d) a mirror
27. 27.⚖️ 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
28. 28.⚖️ 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
29. 29.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it doubles (d) it halves
30. 30.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
31. 31.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 16 seconds?
32. 32.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a string (c) a ruler (d) a heavy nut or washer
33. 33.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
34. 34.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a stopwatch (c) a string (d) yeast
35. 35.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a digital watch (c) a phone (d) a sundial
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a string (c) a heavy nut or washer (d) a stopwatch
37. 37.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
38. 38.True or false: a string is needed for the pendulum. (a) False (b) True
39. 39.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
40. 40.⚖️ 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 same hook (c) the string length

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