Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 716 · 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 needed for the pendulum? (a) a balloon (b) a magnet (c) a pencil and tape (d) yeast
2. 2.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the string (d) the wind
3. 3.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a magnet (c) a ruler (d) a heavy nut or washer
4. 4.⚖️ 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 keep it the same (c) we measure it
5. 5.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) a battery cell (d) a stopwatch
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a heavy nut or washer (d) a battery cell
7. 7.True or false: yeast is needed for the pendulum. (a) True (b) False
8. 8.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) it is magnetic (d) the bob could hit you
9. 9.⚖️ 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 change it (c) we measure it
10. 10.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
11. 11.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
12. 12.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a heavy nut or washer (c) a stopwatch (d) a pencil and tape
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a ruler (d) a balloon
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a stopwatch (c) a pencil and tape (d) a heavy nut or washer
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we measure it (c) we keep it the same
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a mirror (d) a ruler
17. 17.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
18. 18.🕰️ 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
19. 19.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a lighter bob (c) a heavier bob (d) a shorter string
20. 20.True or false: a ruler is not needed for the pendulum. (a) False (b) True
21. 21.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) quicker (c) slower (d) stopped
22. 22.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
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) yeast (d) a pencil and tape
24. 24.🛟 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
25. 25.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) the weight of the bob (c) the same hook (d) the string length
27. 27.⚖️ 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
28. 28.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
29. 29.⚖️ 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
30. 30.⚖️ 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
31. 31.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
32. 32.True or false: a string is not needed for the pendulum. (a) True (b) False
33. 33.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a string (c) a magnet (d) a mirror
34. 34.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
35. 35.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) a string (d) turmeric powder
37. 37.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
38. 38.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
39. 39.⚖️ 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
40. 40.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a balloon (c) a mirror (d) a heavy nut or washer

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