Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 918 · 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) time for 10 swings (b) the weight of the bob (c) how far we pull it back (d) the string length
2. 2.⚖️ 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) True (b) False
3. 3.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a small nut or washer (d) a heavy brick
4. 4.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a longer string (d) a heavier bob
5. 5.⚖️ 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
6. 6.True or false: a mirror is not needed for the pendulum. (a) False (b) True
7. 7.🕰️ 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
8. 8.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
9. 9.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
10. 10.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) stopped (d) heavier
11. 11.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it halves (d) it doubles
12. 12.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) turmeric powder (c) a magnet (d) yeast
13. 13.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 57 seconds?
14. 14.⚖️ 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 change it (c) we keep it the same
15. 15.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a phone (c) a digital watch (d) a sundial
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) a battery cell (d) a ruler
17. 17.🧺 Which of these is not needed for the pendulum? (a) a string (b) a heavy nut or washer (c) a ruler (d) a magnet
18. 18.⚖️ 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 weight of the bob (c) the string length (d) time for 10 swings
19. 19.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) a balloon (d) a ruler
20. 20.⚖️ 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
21. 21.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
22. 22.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) a mirror (d) a ruler
23. 23.🧺 Do we need a mirror 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 ruler (b) a string (c) a stopwatch (d) a mirror
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we keep it the same (c) we measure it
26. 26.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 16 seconds?
27. 27.⚖️ 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 keep it the same (c) we change it
28. 28.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a battery cell (c) a stopwatch (d) a heavy nut or washer
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a balloon (d) a ruler
30. 30.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is magnetic (c) it is hot (d) it is wet
31. 31.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) gravity (c) the wind (d) magnetism
32. 32.⚖️ 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
33. 33.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
34. 34.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
35. 35.⚖️ 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) True (b) False
36. 36.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a balloon (c) yeast (d) a string
37. 37.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
38. 38.⚖️ 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
39. 39.True or false: a string is not needed for the pendulum. (a) False (b) True
40. 40.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) a ruler (d) yeast

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