Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 748 · 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.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the same hook (c) time for 10 swings
2. 2.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) quicker (c) stopped (d) slower
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) how far we pull it back (c) time for 10 swings (d) the same hook
4. 4.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 9 seconds?
5. 5.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
6. 6.⚖️ 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
7. 7.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
8. 8.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) the wind (c) gravity (d) magnetism
9. 9.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a heavy brick (c) a sharp tool (d) a glass bottle
10. 10.⚖️ 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 keep it the same (c) we change it
11. 11.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much faster (c) it cannot swing (d) much slower
12. 12.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a magnet (c) a string (d) a pencil and tape
13. 13.True or false: a balloon is needed for the pendulum. (a) True (b) False
14. 14.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
15. 15.⚖️ 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 weight of the bob (c) the string length
16. 16.⚖️ 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
17. 17.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a phone (d) a grandfather clock
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
19. 19.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
20. 20.True or false: a battery cell is needed for the pendulum. (a) True (b) False
21. 21.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a battery cell (d) a string
23. 23.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a balloon (c) yeast (d) a ruler
24. 24.True or false: yeast is needed for the pendulum. (a) True (b) False
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a ruler (d) a mirror
26. 26.🕰️ 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 fun (d) it is more accurate
27. 27.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
28. 28.⚖️ 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
29. 29.⚖️ 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
30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a heavy nut or washer (c) a pencil and tape (d) a ruler
31. 31.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
32. 32.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
33. 33.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it stays the same (d) it doubles
34. 34.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
35. 35.⚖️ 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) time for 10 swings (d) the string length
36. 36.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
37. 37.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
38. 38.True or false: a string is needed for the pendulum. (a) True (b) False
39. 39.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
40. 40.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed

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