Simple Pendulum Experiment Worksheet

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

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