Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 695 · 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 do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) it is more fun (c) 10 is a lucky number (d) one swing is too slow
2. 2.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
3. 3.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a ruler (c) a string (d) a stopwatch
4. 4.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a small nut or washer (d) a heavy brick
5. 5.⚖️ 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
6. 6.True or false: a string is not needed for the pendulum. (a) True (b) False
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) the same hook (c) how far we pull it back (d) the weight of the bob
8. 8.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a heavy nut or washer (c) a mirror (d) yeast
9. 9.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
10. 10.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) yes, much slower (c) no, hardly at all (d) it stops swinging
11. 11.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the wind (c) gravity (d) the string
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) turmeric powder (c) a pencil and tape (d) a stopwatch
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a mirror (c) a string (d) a heavy nut or washer
14. 14.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a phone (c) a digital watch (d) a grandfather clock
15. 15.🔮 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
16. 16.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
17. 17.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a pencil and tape (c) a magnet (d) a battery cell
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) the weight of the bob (c) the string length (d) how far we pull it back
19. 19.⚖️ 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) False (b) True
20. 20.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) yeast (d) a string
21. 21.🧺 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
22. 22.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) yeast (c) a stopwatch (d) a mirror
23. 23.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
24. 24.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
25. 25.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a string (c) a heavy nut or washer (d) a stopwatch
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
27. 27.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
28. 28.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a magnet (c) a stopwatch (d) a ruler
30. 30.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is magnetic (d) it is wet
31. 31.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
32. 32.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
33. 33.True or false: a mirror is not needed for the pendulum. (a) False (b) True
34. 34.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a lighter bob (d) a longer string
35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) True (b) False
36. 36.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 36 seconds?
37. 37.⚖️ 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
38. 38.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
39. 39.⚖️ 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
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a balloon (d) a string

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