Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 816 · 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) a string (b) yeast (c) a heavy nut or washer (d) a ruler
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a ruler (c) a heavy nut or washer (d) a stopwatch
4. 4.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much faster (c) yes, much slower (d) it stops swinging
5. 5.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the wind (c) the string (d) magnetism
6. 6.🔮 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
7. 7.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a lighter bob (d) a longer string
8. 8.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
9. 9.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a phone (c) a digital watch (d) a grandfather clock
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) time for 10 swings (c) the same hook (d) how far we pull it back
11. 11.⚖️ 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
12. 12.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
13. 13.⚖️ 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 change it (b) we keep it the same (c) we measure it
14. 14.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
15. 15.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) a string (d) a mirror
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a pencil and tape (c) turmeric powder (d) a stopwatch
17. 17.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
18. 18.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a glass bottle (d) a small nut or washer
19. 19.⚖️ 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 keep it the same (c) we measure it
20. 20.⚖️ 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) the weight of the bob (c) the string length (d) time for 10 swings
21. 21.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 36 seconds?
22. 22.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a stopwatch (c) a balloon (d) a string
23. 23.⚖️ 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
24. 24.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
25. 25.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) heavier (d) quicker
26. 26.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
27. 27.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a balloon (c) a pencil and tape (d) a magnet
28. 28.⚖️ 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
29. 29.⚖️ 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
30. 30.True or false: a balloon is needed for the pendulum. (a) False (b) True
31. 31.⚖️ 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
32. 32.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a balloon (c) a magnet (d) a ruler
33. 33.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
34. 34.🛟 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
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a string (d) a balloon
36. 36.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
37. 37.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
38. 38.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
39. 39.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a mirror (c) a string (d) a heavy nut or washer

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