Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 778 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a ruler (c) a heavy nut or washer (d) a string
2. 2.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we keep it the same (c) we change it
4. 4.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) heavier (d) stopped
5. 5.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) it stops swinging (c) no, hardly at all (d) yes, much slower
6. 6.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a balloon (c) a heavy nut or washer (d) a battery cell
7. 7.🛟 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
8. 8.True or false: a string is not needed for the pendulum. (a) True (b) False
9. 9.🛟 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
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) the same hook (c) the weight of the bob (d) time for 10 swings
11. 11.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
12. 12.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) turmeric powder (d) a ruler
13. 13.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) turmeric powder (d) a stopwatch
14. 14.⚖️ 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) False (b) True
15. 15.⚖️ 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) True (b) False
16. 16.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
17. 17.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
18. 18.⚖️ 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) the same hook
19. 19.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
20. 20.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a battery cell (d) a pencil and tape
22. 22.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) False (b) True
24. 24.⚖️ 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
25. 25.⚖️ 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
26. 26.⚖️ 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
27. 27.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 18 seconds?
28. 28.⚖️ 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
29. 29.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
30. 30.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
31. 31.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
32. 32.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
33. 33.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) it cannot swing (c) about the same (d) much slower
34. 34.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it becomes 4 times (d) it stays the same
35. 35.🧺 Which of these is needed for the pendulum? (a) yeast (b) turmeric powder (c) a stopwatch (d) a battery cell
36. 36.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
37. 37.⚖️ 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
38. 38.⚖️ 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
39. 39.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) a stopwatch (d) a magnet
40. 40.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?

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