Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 179 · 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.True or false: a ruler is not needed for the pendulum. (a) True (b) False
2. 2.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the wind (d) the string
3. 3.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a digital watch (d) a sundial
4. 4.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a heavier bob (c) a lighter bob (d) a shorter string
5. 5.⚖️ 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
6. 6.⚖️ 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
7. 7.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a heavy nut or washer (c) a string (d) a pencil and tape
8. 8.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) no, hardly at all (c) yes, much faster (d) it stops swinging
9. 9.⚖️ 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 same hook (c) the string length
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a heavy nut or washer (c) a pencil and tape (d) a ruler
11. 11.⚖️ 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) True (b) False
12. 12.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
13. 13.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) stopped (d) heavier
14. 14.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) a mirror (c) a magnet (d) turmeric powder
15. 15.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a small nut or washer (c) a heavy brick (d) a sharp tool
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a heavy nut or washer (c) a string (d) a pencil and tape
17. 17.⚖️ 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 weight of the bob (d) the same hook
18. 18.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it doubles (c) it becomes 4 times (d) it stays the same
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) the same hook (c) how far we pull it back (d) the weight of the bob
20. 20.⚖️ 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) how far we pull it back
21. 21.True or false: a balloon is needed for the pendulum. (a) True (b) False
22. 22.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more accurate (c) 10 is a lucky number (d) it is more fun
23. 23.True or false: a magnet is not needed for the pendulum. (a) True (b) False
24. 24.⚖️ 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
25. 25.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
26. 26.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
27. 27.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
28. 28.True or false: a balloon is not needed for the pendulum. (a) False (b) True
29. 29.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) it cannot swing (c) much faster (d) much slower
30. 30.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we measure it (c) we change it
32. 32.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 14 seconds?
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a mirror (d) a pencil and tape
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.⚖️ 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
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) turmeric powder (c) a string (d) a heavy nut or washer
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a stopwatch (d) a magnet
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a pencil and tape (d) a balloon
39. 39.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
40. 40.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True

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