Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 694 · 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.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a heavy brick (c) a glass bottle (d) a sharp tool
2. 2.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) the bob could hit you (d) it is wet
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a heavy nut or washer (d) a balloon
4. 4.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) slower (d) heavier
5. 5.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
7. 7.True or false: a string is not needed for the pendulum. (a) False (b) True
8. 8.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
9. 9.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a battery cell (c) a ruler (d) turmeric powder
10. 10.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 9 seconds?
11. 11.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) yeast (c) a string (d) a balloon
12. 12.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a balloon (c) a magnet (d) a pencil and tape
13. 13.⚖️ 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) False (b) True
14. 14.⚖️ 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
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) time for 10 swings (c) how far we pull it back (d) the same hook
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a magnet (d) a string
17. 17.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
18. 18.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a string (d) a balloon
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) how far we pull it back (c) time for 10 swings
20. 20.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
21. 21.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a stopwatch (c) a balloon (d) a mirror
22. 22.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
23. 23.True or false: a balloon is not needed for the pendulum. (a) False (b) True
24. 24.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the wind (c) the string (d) magnetism
25. 25.True or false: a mirror is needed for the pendulum. (a) True (b) False
26. 26.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 12 seconds?
27. 27.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a heavier bob (c) a lighter bob (d) a shorter string
28. 28.True or false: yeast is needed for the pendulum. (a) True (b) False
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the weight of the bob
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
31. 31.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 30 seconds?
32. 32.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a phone (c) a digital watch (d) a grandfather clock
33. 33.True or false: a battery cell is needed for the pendulum. (a) False (b) True
34. 34.⚖️ 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
35. 35.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) 10 is a lucky number (c) it is more accurate (d) it is more fun
36. 36.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 6 seconds?
37. 37.⚖️ 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) time for 10 swings (c) how far we pull it back (d) the string length
38. 38.⚖️ 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
39. 39.⚖️ 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
40. 40.⚖️ 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) False (b) True

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