Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 309 · 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 45 seconds. How many seconds does one swing take?
2. 2.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) it is hot (d) the bob could hit you
3. 3.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 57 seconds?
4. 4.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?
5. 5.🛟 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
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a stopwatch (d) a mirror
7. 7.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
8. 8.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
9. 9.True or false: a balloon is not needed for the pendulum. (a) True (b) False
10. 10.⚖️ 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
11. 11.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a string (c) a magnet (d) turmeric powder
12. 12.⚖️ 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
13. 13.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) about the same (c) it cannot swing (d) much slower
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) the weight of the bob (c) time for 10 swings (d) the string length
15. 15.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it becomes 4 times (d) it doubles
16. 16.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a balloon (d) a string
18. 18.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a phone (d) a sundial
19. 19.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 22 seconds?
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) yeast (d) a heavy nut or washer
21. 21.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) yeast (c) a magnet (d) a mirror
22. 22.⚖️ 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 keep it the same (c) we change it
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a stopwatch (c) a string (d) a heavy nut or washer
24. 24.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a lighter bob (d) a longer string
25. 25.⚖️ 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
26. 26.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 24 seconds?
27. 27.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
28. 28.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more fun (c) it is more accurate (d) one swing is too slow
29. 29.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
30. 30.⚖️ 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
31. 31.⚖️ 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
32. 32.True or false: a string is needed for the pendulum. (a) False (b) True
33. 33.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
34. 34.⚖️ 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
35. 35.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a heavy nut or washer (c) a pencil and tape (d) a ruler
36. 36.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) the wind (d) gravity
37. 37.🧺 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 pencil and tape
38. 38.⚖️ 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
39. 39.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) heavier (d) quicker
40. 40.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a pencil and tape (c) a heavy nut or washer (d) a mirror

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