Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 905 · 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 change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a longer string (d) a lighter bob
2. 2.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) a mirror (c) a balloon (d) yeast
3. 3.⚖️ 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 same hook (c) the string length
4. 4.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
5. 5.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a mirror (c) a stopwatch (d) a heavy nut or washer
7. 7.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a ruler (c) a string (d) a heavy nut or washer
9. 9.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much slower (c) much faster (d) it cannot swing
10. 10.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
11. 11.🛟 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
12. 12.⚖️ 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) how far we pull it back (c) the string length (d) the weight of the bob
13. 13.🔮 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
14. 14.🧺 Which of these is needed for the pendulum? (a) a magnet (b) turmeric powder (c) a string (d) a balloon
15. 15.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) no, hardly at all (c) it stops swinging (d) yes, much slower
16. 16.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) False (b) True
18. 18.True or false: a string is not needed for the pendulum. (a) True (b) False
19. 19.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a balloon (c) a heavy nut or washer (d) yeast
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) False (b) True
21. 21.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the wind (c) the string (d) gravity
22. 22.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 15 seconds?
23. 23.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) a magnet (d) a pencil and tape
24. 24.⚖️ 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
25. 25.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a grandfather clock (c) a digital watch (d) a phone
26. 26.⚖️ 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
27. 27.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
28. 28.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
29. 29.⚖️ 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
30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a magnet (c) a heavy nut or washer (d) a string
31. 31.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a ruler (c) a stopwatch (d) a pencil and tape
32. 32.🧺 Which of these is needed for the pendulum? (a) a ruler (b) a magnet (c) a battery cell (d) a mirror
33. 33.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
34. 34.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
35. 35.⚖️ 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
36. 36.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
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 keep it the same (c) we measure it
38. 38.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
39. 39.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) the weight of the bob (c) time for 10 swings (d) the same hook

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