Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 152 · 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 heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) it cannot swing (d) much faster
2. 2.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a stopwatch (c) a string (d) a ruler
4. 4.🕰️ 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
5. 5.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
6. 6.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
7. 7.⚖️ 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 same hook (c) time for 10 swings (d) the weight of the bob
8. 8.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
9. 9.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
10. 10.⚖️ 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
11. 11.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it doubles (c) it becomes 4 times (d) it stays the same
12. 12.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 42 seconds?
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a string (c) a stopwatch (d) a heavy nut or washer
14. 14.⚖️ 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 measure it (c) we change it
15. 15.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) stopped (d) heavier
16. 16.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
17. 17.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
18. 18.True or false: yeast is not needed for the pendulum. (a) False (b) True
19. 19.🧺 Which of these is needed for the pendulum? (a) a ruler (b) a mirror (c) turmeric powder (d) a magnet
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we change it (c) we measure it
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we measure it (c) we change it
22. 22.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
23. 23.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
24. 24.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
25. 25.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) True (b) False
27. 27.⚖️ 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
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) the weight of the bob (c) the string length (d) how far we pull it back
29. 29.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
30. 30.⚖️ 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) True (b) False
31. 31.🛟 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
32. 32.⚖️ 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 weight of the bob (c) the string length
33. 33.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 11 seconds?
34. 34.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
35. 35.⚖️ 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
36. 36.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 18 seconds?
37. 37.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a small nut or washer (d) a glass bottle
38. 38.True or false: a magnet is not needed for the pendulum. (a) True (b) False
39. 39.⚖️ 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
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a stopwatch (c) a string (d) a pencil and tape

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