Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 182 · 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.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
2. 2.⚖️ 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 string length (d) the same hook
3. 3.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
4. 4.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a sharp tool (c) a glass bottle (d) a heavy brick
5. 5.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) magnetism (c) the wind (d) the string
6. 6.⚖️ 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
7. 7.⚖️ 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
8. 8.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
9. 9.⚖️ 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
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) turmeric powder (d) a pencil and tape
11. 11.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 16 seconds?
12. 12.True or false: a magnet is not needed for the pendulum. (a) False (b) True
13. 13.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) a magnet (d) a heavy nut or washer
14. 14.⚖️ 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
15. 15.⚖️ 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) time for 10 swings (c) how far we pull it back (d) the string length
16. 16.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
17. 17.⚖️ 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
18. 18.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
19. 19.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) stopped (d) quicker
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a battery cell (c) a pencil and tape (d) a string
21. 21.⚖️ 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
22. 22.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a shorter string (c) a heavier bob (d) a longer string
23. 23.🧺 Which of these is needed for the pendulum? (a) a string (b) a battery cell (c) a magnet (d) turmeric powder
24. 24.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a heavy nut or washer (c) a string (d) a ruler
25. 25.⚖️ 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
26. 26.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) it is wet (d) the bob could hit you
27. 27.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
28. 28.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
29. 29.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a magnet (c) a mirror (d) yeast
30. 30.🧺 Which of these is needed for the pendulum? (a) a mirror (b) turmeric powder (c) a stopwatch (d) a battery cell
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) True (b) False
32. 32.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) the string length (c) the same hook
34. 34.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a grandfather clock (c) a digital watch (d) a phone
35. 35.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) much faster (c) it cannot swing (d) about the same
36. 36.🔮 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 stays the same (d) it halves
37. 37.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a mirror (c) a stopwatch (d) a heavy nut or washer
38. 38.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a string (c) a heavy nut or washer (d) a stopwatch
40. 40.True or false: a stopwatch is needed for the pendulum. (a) False (b) True

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