Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 931 · 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.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is magnetic (d) it is hot
2. 2.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) gravity (c) magnetism (d) the string
3. 3.⚖️ 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
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we keep it the same (c) we change it
5. 5.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a heavier bob (d) a longer string
6. 6.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) False (b) True
8. 8.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a stopwatch (c) a pencil and tape (d) turmeric powder
9. 9.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
10. 10.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a string (d) a magnet
11. 11.⚖️ 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) the string length (d) the same hook
12. 12.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) about the same (d) it cannot swing
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 measure it (c) we change it
14. 14.🧺 Which of these is not needed for the pendulum? (a) a string (b) a stopwatch (c) yeast (d) a pencil and tape
15. 15.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 20 seconds?
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a magnet (d) a ruler
17. 17.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a sundial (d) a phone
18. 18.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a small nut or washer (c) a heavy brick (d) a sharp tool
19. 19.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) no, hardly at all (c) it stops swinging (d) yes, much slower
20. 20.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
21. 21.True or false: a mirror is needed for the pendulum. (a) False (b) True
22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a pencil and tape (c) a ruler (d) a stopwatch
23. 23.⚖️ 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
24. 24.⚖️ 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
25. 25.⚖️ 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
26. 26.⚖️ 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
27. 27.True or false: a balloon is not needed for the pendulum. (a) True (b) False
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) False (b) True
29. 29.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
30. 30.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
31. 31.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 60 seconds?
32. 32.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
33. 33.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it doubles (c) it halves (d) it becomes 4 times
34. 34.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) quicker (c) stopped (d) slower
35. 35.🧺 Which of these is needed for the pendulum? (a) a string (b) a mirror (c) a magnet (d) turmeric powder
36. 36.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 42 seconds?
37. 37.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
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.True or false: a balloon is needed for the pendulum. (a) False (b) True
40. 40.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed

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