Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 380 · 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.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) 10 is a lucky number (c) one swing is too slow (d) it is more fun
2. 2.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) yeast (c) a magnet (d) a pencil and tape
3. 3.⚖️ 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) False (b) True
4. 4.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it stays the same (d) it doubles
5. 5.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) the bob could hit you (d) it is hot
6. 6.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a stopwatch (c) a string (d) a ruler
7. 7.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) stopped (c) heavier (d) slower
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we measure it (c) we keep it the same
9. 9.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
10. 10.🧺 Which of these is needed for the pendulum? (a) a mirror (b) yeast (c) a battery cell (d) a string
11. 11.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
12. 12.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
13. 13.⚖️ 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 string length (c) how far we pull it back
14. 14.🧺 Which of these is not needed for the pendulum? (a) a string (b) a stopwatch (c) a heavy nut or washer (d) a magnet
15. 15.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
16. 16.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
17. 17.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a magnet (d) a string
19. 19.⚖️ 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 string length (c) the same hook
20. 20.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a heavier bob (c) a shorter string (d) a lighter bob
21. 21.⚖️ 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
22. 22.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
23. 23.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
24. 24.⚖️ 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
25. 25.⚖️ 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
26. 26.True or false: a string is not needed for the pendulum. (a) False (b) True
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a pencil and tape (c) a string (d) a heavy nut or washer
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) True (b) False
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a heavy nut or washer (d) a battery cell
30. 30.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a small nut or washer (c) a sharp tool (d) a glass bottle
31. 31.⚖️ 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) time for 10 swings (c) how far we pull it back (d) the string length
32. 32.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a stopwatch (d) yeast
34. 34.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
35. 35.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) the wind (d) gravity
36. 36.⚖️ 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
37. 37.True or false: a string is needed for the pendulum. (a) True (b) False
38. 38.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a battery cell (c) yeast (d) a balloon
39. 39.True or false: a balloon is needed for the pendulum. (a) False (b) True
40. 40.🔮 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

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