Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 262 · 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.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much faster (c) it stops swinging (d) yes, much slower
2. 2.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a heavy brick (c) a glass bottle (d) a sharp tool
3. 3.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it stays the same (d) it doubles
4. 4.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) heavier (d) quicker
5. 5.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) how far we pull it back (c) the weight of the bob (d) time for 10 swings
7. 7.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a stopwatch (d) a mirror
8. 8.🧺 Which of these is needed for the pendulum? (a) a string (b) turmeric powder (c) yeast (d) a balloon
9. 9.⚖️ 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
10. 10.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is hot (d) it is magnetic
11. 11.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
12. 12.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
13. 13.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
14. 14.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a lighter bob (d) a shorter string
15. 15.⚖️ 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) time for 10 swings (d) the string length
16. 16.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) yeast (c) a magnet (d) a balloon
17. 17.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
18. 18.⚖️ 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
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a ruler (c) a string (d) a pencil and tape
20. 20.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a grandfather clock (c) a phone (d) a digital watch
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
22. 22.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
23. 23.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) True (b) False
25. 25.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
26. 26.🔮 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
27. 27.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
28. 28.⚖️ 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 measure it (c) we keep it the same
29. 29.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
30. 30.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 10 seconds?
31. 31.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
32. 32.⚖️ 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
33. 33.True or false: a ruler is not needed for the pendulum. (a) False (b) True
34. 34.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a stopwatch (c) a heavy nut or washer (d) a battery cell
35. 35.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a pencil and tape (c) a ruler (d) a heavy nut or washer
36. 36.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 28 seconds?
37. 37.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
38. 38.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) magnetism (c) the string (d) gravity
39. 39.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
40. 40.⚖️ 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

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