Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 307 · 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? True or false: the string length is what we measure. (a) False (b) True
2. 2.⚖️ 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
3. 3.🧺 Which of these is not needed for the pendulum? (a) a string (b) a stopwatch (c) turmeric powder (d) a ruler
4. 4.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a battery cell (d) a string
5. 5.True or false: a string is not needed for the pendulum. (a) True (b) False
6. 6.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it doubles (c) it halves (d) it stays the same
7. 7.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) the bob could hit you (d) it is hot
8. 8.True or false: a balloon is not needed for the pendulum. (a) True (b) False
9. 9.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) the wind (d) gravity
10. 10.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
11. 11.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a ruler (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 stopwatch (b) a pencil and tape (c) a heavy nut or washer (d) turmeric powder
14. 14.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a ruler (c) a mirror (d) a stopwatch
15. 15.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a battery cell (c) a stopwatch (d) yeast
16. 16.⚖️ 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 keep it the same (c) we change it
17. 17.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a heavy nut or washer (c) a battery cell (d) turmeric powder
18. 18.⚖️ 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 change it (c) we measure it
19. 19.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a glass bottle (d) a heavy brick
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 change it (b) we keep it the same (c) we measure it
21. 21.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) yeast (c) a ruler (d) a stopwatch
22. 22.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
23. 23.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a magnet (d) a pencil and tape
25. 25.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the weight of the bob (c) time for 10 swings
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a heavy nut or washer (d) yeast
28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a mirror (d) a stopwatch
29. 29.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a phone (c) a grandfather clock (d) a sundial
30. 30.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) quicker (d) stopped
31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a heavy nut or washer (d) a battery cell
32. 32.⚖️ 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) how far we pull it back (c) the same hook (d) the string length
33. 33.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
34. 34.⚖️ 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
35. 35.True or false: a string is needed for the pendulum. (a) True (b) False
36. 36.True or false: a ruler is not needed for the pendulum. (a) False (b) True
37. 37.True or false: a magnet is needed for the pendulum. (a) False (b) True
38. 38.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a lighter bob (c) a shorter string (d) a heavier bob
39. 39.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
40. 40.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) yes, much faster (c) no, hardly at all (d) it stops swinging

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