Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 941 · 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.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) the string length (c) the same hook (d) time for 10 swings
2. 2.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a sharp tool (d) a small nut or washer
3. 3.True or false: a balloon is not needed for the pendulum. (a) False (b) True
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True
5. 5.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
6. 6.⚖️ 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
7. 7.⚖️ 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) False (b) True
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 measure it (b) we change it (c) we keep it the same
9. 9.⚖️ 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
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) the same hook (c) time for 10 swings (d) how far we pull it back
11. 11.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a string (c) a heavy nut or washer (d) a stopwatch
12. 12.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 16 seconds?
13. 13.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
14. 14.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 17 seconds?
15. 15.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
16. 16.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is hot (c) the bob could hit you (d) it is magnetic
17. 17.True or false: a balloon is needed for the pendulum. (a) False (b) True
18. 18.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it stays the same (c) it doubles (d) it becomes 4 times
19. 19.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
20. 20.⚖️ 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
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a magnet (d) a heavy nut or washer
22. 22.True or false: a string is needed for the pendulum. (a) False (b) True
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a pencil and tape (c) a stopwatch (d) a string
24. 24.⚖️ 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
25. 25.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a stopwatch (c) yeast (d) a mirror
26. 26.⚖️ 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) False (b) True
27. 27.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) heavier (c) stopped (d) slower
28. 28.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a battery cell (c) a heavy nut or washer (d) a stopwatch
29. 29.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a digital watch (d) a grandfather clock
30. 30.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
31. 31.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) turmeric powder (c) a pencil and tape (d) a stopwatch
32. 32.⚖️ 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) False (b) True
33. 33.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) no, hardly at all (c) yes, much faster (d) it stops swinging
34. 34.True or false: yeast is not needed for the pendulum. (a) True (b) False
35. 35.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a ruler (c) a mirror (d) a balloon
36. 36.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 36 seconds?
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we keep it the same (c) we change it
38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) False (b) True
39. 39.⚖️ 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
40. 40.True or false: a mirror is not needed for the pendulum. (a) True (b) False

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