Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 652 · 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 what we measure? (a) the string length (b) the same hook (c) time for 10 swings (d) the weight of the bob
2. 2.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) it is wet (d) the bob could hit you
3. 3.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
4. 4.True or false: a mirror is needed for the pendulum. (a) True (b) False
5. 5.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
6. 6.True or false: yeast is needed for the pendulum. (a) False (b) True
7. 7.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
8. 8.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a small nut or washer (d) a sharp tool
9. 9.⚖️ 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
10. 10.True or false: a string is needed for the pendulum. (a) True (b) False
11. 11.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
12. 12.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
13. 13.True or false: a magnet is not needed for the pendulum. (a) False (b) True
14. 14.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) stopped (d) heavier
15. 15.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
16. 16.⚖️ 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
17. 17.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) gravity (d) the wind
18. 18.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
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 measure it (c) we keep it the same
20. 20.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) no, hardly at all (c) yes, much slower (d) yes, much faster
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) True (b) False
22. 22.⚖️ 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
23. 23.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it becomes 4 times (d) it stays the same
24. 24.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
25. 25.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?
26. 26.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a heavy nut or washer (c) a mirror (d) a balloon
27. 27.🧺 Which of these is needed for the pendulum? (a) a magnet (b) yeast (c) a pencil and tape (d) turmeric powder
28. 28.⚖️ 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 keep it the same (c) we change it
29. 29.🧺 Which of these is needed for the pendulum? (a) a ruler (b) a magnet (c) a battery cell (d) a balloon
30. 30.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) a magnet (d) a stopwatch
31. 31.⚖️ 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) False (b) True
32. 32.⚖️ 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 weight of the bob (c) the string length
33. 33.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a pencil and tape (c) a magnet (d) a heavy nut or washer
34. 34.⚖️ 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) True (b) False
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a magnet (c) a ruler (d) a pencil and tape
36. 36.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
37. 37.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a sundial (c) a phone (d) a digital watch
38. 38.⚖️ 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) False (b) True
39. 39.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) it cannot swing (c) much slower (d) about the same
40. 40.⚖️ 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) time for 10 swings (c) the same hook (d) the string length

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