Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 845 · 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.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a string (d) yeast
2. 2.True or false: a string is not needed for the pendulum. (a) True (b) False
3. 3.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) a balloon (d) a pencil and tape
5. 5.⚖️ 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 change it (c) we measure it
6. 6.⚖️ 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
7. 7.🧺 Which of these is not needed for the pendulum? (a) a string (b) a mirror (c) a heavy nut or washer (d) a ruler
8. 8.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a ruler (d) turmeric powder
9. 9.True or false: a ruler is not needed for the pendulum. (a) False (b) True
10. 10.True or false: a battery cell is needed for the pendulum. (a) True (b) False
11. 11.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) gravity (d) the wind
12. 12.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
13. 13.⚖️ 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
14. 14.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a grandfather clock (d) a digital watch
15. 15.⚖️ 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) False (b) True
16. 16.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 9 seconds?
17. 17.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
18. 18.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) yeast (c) a magnet (d) a battery cell
19. 19.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
20. 20.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) much faster (c) about the same (d) it cannot swing
21. 21.⚖️ 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
22. 22.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
23. 23.True or false: a mirror is needed for the pendulum. (a) False (b) True
24. 24.⚖️ 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
25. 25.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more fun (c) 10 is a lucky number (d) it is more accurate
26. 26.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a small nut or washer (d) a heavy brick
27. 27.⚖️ 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
28. 28.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
29. 29.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a longer string (c) a shorter string (d) a heavier bob
30. 30.🧺 Which of these is not needed for the pendulum? (a) a string (b) a balloon (c) a heavy nut or washer (d) a pencil and tape
31. 31.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it stays the same (c) it becomes 4 times (d) it doubles
32. 32.True or false: yeast is not needed for the pendulum. (a) False (b) True
33. 33.True or false: a magnet is not needed for the pendulum. (a) True (b) False
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) how far we pull it back (b) time for 10 swings (c) the weight of the bob (d) the string length
35. 35.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) quicker (d) heavier
36. 36.⚖️ 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 string length (c) the same hook (d) time for 10 swings
37. 37.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a ruler (c) a magnet (d) turmeric powder
38. 38.True or false: a magnet is needed for the pendulum. (a) False (b) True
39. 39.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 16 seconds?
40. 40.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is hot (d) it is wet

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