Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 998 · 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.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) how far we pull it back (b) the string length (c) the same hook (d) the weight of the bob
2. 2.True or false: a string is needed for the pendulum. (a) False (b) True
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a string (d) a mirror
4. 4.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a sharp tool (d) a small nut or washer
5. 5.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a magnet (d) a heavy nut or washer
7. 7.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) time for 10 swings (c) the same hook (d) how far we pull it back
9. 9.True or false: a battery cell is needed for the pendulum. (a) False (b) True
10. 10.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) yeast (d) a heavy nut or washer
11. 11.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a lighter bob (d) a shorter string
12. 12.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) heavier (c) slower (d) stopped
13. 13.⚖️ 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) True (b) False
14. 14.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
15. 15.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a stopwatch (d) a balloon
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
17. 17.🕰️ 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
18. 18.⚖️ 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
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we change it (c) we keep it the same
20. 20.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 6 seconds?
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
22. 22.🛟 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
23. 23.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a pencil and tape (c) turmeric powder (d) a balloon
24. 24.True or false: a mirror is needed for the pendulum. (a) False (b) True
25. 25.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a string (c) a heavy nut or washer (d) a stopwatch
26. 26.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a balloon (c) turmeric powder (d) a heavy nut or washer
27. 27.⚖️ 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
28. 28.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
29. 29.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more accurate (c) one swing is too slow (d) it is more fun
30. 30.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) magnetism (c) gravity (d) the string
31. 31.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it doubles (c) it becomes 4 times (d) it stays the same
32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) False (b) True
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) yeast (c) a pencil and tape (d) a stopwatch
34. 34.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) a mirror (d) a heavy nut or washer
35. 35.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a sundial (d) a phone
36. 36.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
37. 37.⚖️ 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) True (b) False
38. 38.⚖️ 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 weight of the bob
39. 39.True or false: a balloon is not needed for the pendulum. (a) False (b) True
40. 40.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a battery cell (c) a mirror (d) a string

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