Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 378 · 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.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
2. 2.🛟 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
3. 3.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a balloon (c) a stopwatch (d) a pencil and tape
4. 4.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much slower (c) it cannot swing (d) much faster
5. 5.⚖️ 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 same hook (c) the string length (d) time for 10 swings
6. 6.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a magnet (c) a mirror (d) a battery cell
7. 7.⚖️ 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
8. 8.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) quicker (d) stopped
9. 9.⚖️ 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 string length (d) time for 10 swings
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we change it (c) we measure it
11. 11.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a heavy brick (d) a glass bottle
12. 12.⚖️ 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) True (b) False
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) yeast (c) a heavy nut or washer (d) a ruler
14. 14.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a digital watch (d) a sundial
15. 15.⚖️ 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) True (b) False
16. 16.⚖️ 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
17. 17.True or false: a magnet is not needed for the pendulum. (a) False (b) True
18. 18.⚖️ 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
19. 19.True or false: a ruler is needed for the pendulum. (a) True (b) False
20. 20.🧺 Which of these is needed for the pendulum? (a) a ruler (b) turmeric powder (c) yeast (d) a balloon
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) True (b) False
22. 22.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
23. 23.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a battery cell (c) a string (d) a heavy nut or washer
25. 25.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
26. 26.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we measure it (c) we keep it the same
28. 28.⚖️ 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
29. 29.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
30. 30.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
31. 31.⚖️ 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
32. 32.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a shorter string (c) a heavier bob (d) a lighter bob
33. 33.⚖️ 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
34. 34.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) magnetism (c) the string (d) gravity
35. 35.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a mirror (c) a string (d) a pencil and tape
37. 37.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?
38. 38.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it doubles (c) it stays the same (d) it halves
39. 39.🧺 Which of these is needed for the pendulum? (a) yeast (b) a mirror (c) turmeric powder (d) a stopwatch
40. 40.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed

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