Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 533 · 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 pencil and tape is needed for the pendulum. (a) False (b) True
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) the string length (c) the weight of the bob (d) time for 10 swings
3. 3.⚖️ 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
4. 4.🛟 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
5. 5.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) stopped (c) slower (d) heavier
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) the same hook (c) the weight of the bob (d) how far we pull it back
7. 7.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) magnetism (c) the wind (d) the string
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a stopwatch (d) a magnet
9. 9.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
10. 10.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
11. 11.🛟 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
12. 12.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a mirror (c) a pencil and tape (d) yeast
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we change it (c) we measure it
14. 14.🔮 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 doubles (d) it halves
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.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
17. 17.True or false: yeast is not needed for the pendulum. (a) False (b) True
18. 18.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
19. 19.True or false: a ruler is not needed for the pendulum. (a) True (b) False
20. 20.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 20 seconds?
21. 21.True or false: yeast is needed for the pendulum. (a) True (b) False
22. 22.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
23. 23.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a longer string (c) a heavier bob (d) a shorter string
24. 24.⚖️ 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) False (b) True
25. 25.⚖️ 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
26. 26.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a grandfather clock (c) a phone (d) a digital watch
27. 27.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a string (c) a ruler (d) a heavy nut or washer
29. 29.⚖️ 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
30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) yeast (c) a pencil and tape (d) a ruler
31. 31.True or false: a ruler is needed for the pendulum. (a) True (b) False
32. 32.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a balloon (c) a string (d) a pencil and tape
33. 33.⚖️ 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
34. 34.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) yes, much slower (c) it stops swinging (d) no, hardly at all
35. 35.True or false: a string is not needed for the pendulum. (a) False (b) True
36. 36.⚖️ 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
37. 37.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) it cannot swing (c) much faster (d) about the same
38. 38.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
39. 39.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
40. 40.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed

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