Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 788 · 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.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 26 seconds?
2. 2.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a sharp tool (d) a small nut or washer
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) how far we pull it back (c) the weight of the bob (d) time for 10 swings
4. 4.⚖️ 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
5. 5.True or false: a battery cell is needed for the pendulum. (a) False (b) True
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a pencil and tape (d) a magnet
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) turmeric powder (d) a heavy nut or washer
8. 8.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
9. 9.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
10. 10.⚖️ 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 string length (c) how far we pull it back (d) the weight of the bob
11. 11.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) it cannot swing (c) much slower (d) much faster
12. 12.True or false: a magnet is not needed for the pendulum. (a) False (b) True
13. 13.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a magnet (c) yeast (d) a string
14. 14.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
15. 15.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
16. 16.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a battery cell (c) a pencil and tape (d) a stopwatch
17. 17.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
18. 18.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
19. 19.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
20. 20.⚖️ 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 change it (b) we measure it (c) we keep it the same
21. 21.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a lighter bob (d) a longer string
22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a string (c) a pencil and tape (d) a ruler
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) the string length (c) time for 10 swings
24. 24.True or false: a ruler is not needed for the pendulum. (a) True (b) False
25. 25.True or false: a magnet is needed for the pendulum. (a) False (b) True
26. 26.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) the wind (d) gravity
27. 27.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is magnetic (c) it is hot (d) it is wet
28. 28.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) a balloon (c) a battery cell (d) a magnet
29. 29.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
30. 30.🕰️ 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
31. 31.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
32. 32.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
33. 33.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
34. 34.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
35. 35.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it becomes 4 times (d) it doubles
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 measure it (c) we keep it the same
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we measure it (c) we change it
38. 38.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
39. 39.⚖️ 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
40. 40.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed

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