Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 336 · 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.🧺 Which of these is needed for the pendulum? (a) a magnet (b) yeast (c) a battery cell (d) a ruler
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we change it (c) we keep it the same
3. 3.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) the weight of the bob (c) the same hook (d) time for 10 swings
5. 5.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
6. 6.True or false: a magnet is not needed for the pendulum. (a) True (b) False
7. 7.🔮 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
8. 8.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) yes, much slower (c) it stops swinging (d) no, hardly at all
9. 9.⚖️ 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) True (b) False
10. 10.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) about the same (c) much slower (d) much faster
11. 11.⚖️ 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 keep it the same (c) we measure it
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a balloon (d) a pencil and tape
13. 13.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) it is hot (d) the bob could hit you
14. 14.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) the same hook (c) how far we pull it back (d) the string length
17. 17.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a string (c) a stopwatch (d) a ruler
18. 18.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a string (c) a pencil and tape (d) a heavy nut or washer
20. 20.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
21. 21.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) it is more accurate (c) 10 is a lucky number (d) one swing is too slow
22. 22.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) slower (d) quicker
23. 23.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a sundial (d) a phone
24. 24.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
25. 25.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a pencil and tape (c) a ruler (d) a string
26. 26.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
27. 27.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
28. 28.⚖️ 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) False (b) True
29. 29.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a string (c) a stopwatch (d) a pencil and tape
30. 30.⚖️ 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
31. 31.⚖️ 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
32. 32.⚖️ 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 keep it the same (b) we change it (c) we measure it
33. 33.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a small nut or washer (d) a sharp tool
34. 34.True or false: a mirror is needed for the pendulum. (a) True (b) False
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) a battery cell (d) a stopwatch
36. 36.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
37. 37.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
38. 38.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) yeast (c) a magnet (d) a balloon
39. 39.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
40. 40.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a lighter bob (d) a longer string

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