Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 539 · 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.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) a string (d) a balloon
2. 2.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a ruler (c) a battery cell (d) yeast
3. 3.🔮 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
4. 4.⚖️ 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
5. 5.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a string (c) a stopwatch (d) a ruler
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) how far we pull it back (b) time for 10 swings (c) the string length (d) the weight of the bob
8. 8.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
10. 10.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) a pencil and tape (d) yeast
11. 11.⚖️ 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) the weight of the bob
12. 12.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) it is wet (d) the bob could hit you
13. 13.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) slower (d) quicker
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we change it (c) we keep it the same
15. 15.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
16. 16.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a sharp tool (d) a heavy brick
17. 17.True or false: a string is not needed for the pendulum. (a) False (b) True
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
19. 19.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 42 seconds?
20. 20.⚖️ 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
21. 21.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) one swing is too slow (c) 10 is a lucky number (d) it is more fun
22. 22.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) turmeric powder (c) a stopwatch (d) a pencil and tape
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a pencil and tape (d) a mirror
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a battery cell (c) a pencil and tape (d) a heavy nut or washer
25. 25.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a stopwatch (c) a mirror (d) a battery cell
26. 26.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) False (b) True
28. 28.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
29. 29.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a string (c) a pencil and tape (d) a stopwatch
30. 30.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
31. 31.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a heavy nut or washer (c) a magnet (d) a mirror
32. 32.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a digital watch (d) a grandfather clock
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a pencil and tape (d) a magnet
34. 34.⚖️ 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 change it (b) we keep it the same (c) we measure it
35. 35.True or false: a magnet is not needed for the pendulum. (a) True (b) False
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a string (c) a ruler (d) a heavy nut or washer
37. 37.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
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.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) the wind (d) gravity
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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