Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 558 · 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.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
2. 2.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
3. 3.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
4. 4.⚖️ 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) the weight of the bob (d) how far we pull it back
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we measure it (c) we keep it the same
6. 6.True or false: a mirror is not needed for the pendulum. (a) False (b) True
7. 7.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a stopwatch (c) a ruler (d) a string
8. 8.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) it stops swinging (c) yes, much slower (d) yes, much faster
9. 9.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) it is wet (d) the bob could hit you
10. 10.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
11. 11.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 27 seconds?
12. 12.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a small nut or washer (c) a glass bottle (d) a sharp tool
13. 13.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it halves (c) it doubles (d) it stays the same
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) the string length (c) time for 10 swings
15. 15.⚖️ 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
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we change it (c) we keep it the same
17. 17.⚖️ 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
18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a heavy nut or washer (d) turmeric powder
19. 19.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
20. 20.True or false: a battery cell is needed for the pendulum. (a) False (b) True
21. 21.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
22. 22.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
23. 23.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a shorter string (d) a longer string
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) the string length (c) how far we pull it back (d) time for 10 swings
25. 25.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we keep it the same (c) we change it
27. 27.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) yeast (d) a stopwatch
28. 28.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
29. 29.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a grandfather clock (d) a phone
30. 30.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
31. 31.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
32. 32.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 7 seconds?
33. 33.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) a heavy nut or washer (d) a magnet
34. 34.⚖️ 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
35. 35.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
36. 36.True or false: yeast is needed for the pendulum. (a) True (b) False
37. 37.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
38. 38.⚖️ 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 keep it the same (c) we change it
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) False (b) True
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a heavy nut or washer (d) a mirror

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