Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 74 · 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.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we measure it (c) we change it
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a mirror (c) a pencil and tape (d) a heavy nut or washer
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) time for 10 swings (c) the string length (d) the weight of the bob
5. 5.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
6. 6.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a heavy nut or washer (c) a mirror (d) a balloon
7. 7.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) quicker (d) stopped
8. 8.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
9. 9.🧺 Which of these is needed for the pendulum? (a) a mirror (b) turmeric powder (c) a stopwatch (d) a balloon
10. 10.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
11. 11.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
12. 12.⚖️ 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
13. 13.True or false: a magnet is needed for the pendulum. (a) True (b) False
14. 14.🧺 Do we need a magnet 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: how far we pull it back is the one thing we change. (a) False (b) True
16. 16.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) the string (c) magnetism (d) gravity
17. 17.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a balloon (c) a string (d) a stopwatch
18. 18.⚖️ 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
19. 19.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a phone (d) a grandfather clock
20. 20.⚖️ 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
21. 21.⚖️ 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 weight of the bob (c) the same hook (d) the string length
22. 22.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
23. 23.True or false: a magnet is not needed for the pendulum. (a) False (b) True
24. 24.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
25. 25.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a glass bottle (d) a small nut or washer
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) yeast (c) a ruler (d) a string
27. 27.⚖️ 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
28. 28.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 42 seconds?
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a pencil and tape (c) a stopwatch (d) a string
30. 30.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a magnet (d) a heavy nut or washer
31. 31.True or false: a ruler is not needed for the pendulum. (a) True (b) False
32. 32.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) much faster (d) about the same
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) turmeric powder (c) a stopwatch (d) a heavy nut or washer
34. 34.True or false: a mirror is needed for the pendulum. (a) False (b) True
35. 35.⚖️ 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) how far we pull it back
36. 36.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a stopwatch (c) a pencil and tape (d) a string
37. 37.⚖️ 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
38. 38.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a heavier bob (d) a lighter bob
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a ruler (d) a battery cell
40. 40.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much faster (c) yes, much slower (d) it stops swinging

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