Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 568 · 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.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) it is more fun (c) one swing is too slow (d) 10 is a lucky number
2. 2.True or false: a magnet is not needed for the pendulum. (a) False (b) True
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a string (c) a ruler (d) a pencil and tape
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a pencil and tape (d) a battery cell
5. 5.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (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) a stopwatch (b) a balloon (c) a pencil and tape (d) a heavy nut or washer
8. 8.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) quicker (d) slower
9. 9.⚖️ 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
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) the string length (c) the weight of the bob (d) the same hook
11. 11.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
12. 12.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a mirror (c) yeast (d) a pencil and tape
13. 13.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is wet (d) it is magnetic
14. 14.⚖️ 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
15. 15.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a glass bottle (d) a heavy brick
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) False (b) True
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a string (c) a ruler (d) a heavy nut or washer
18. 18.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it halves (d) it doubles
19. 19.True or false: a string is needed for the pendulum. (a) False (b) True
20. 20.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) gravity (d) the wind
21. 21.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
22. 22.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a longer string (d) a lighter bob
23. 23.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a pencil and tape (c) a string (d) a heavy nut or washer
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) True (b) False
25. 25.⚖️ 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) time for 10 swings (c) the weight of the bob (d) how far we pull it back
26. 26.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a mirror (d) a pencil and tape
28. 28.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
29. 29.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) much faster (d) about the same
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we keep it the same (c) we change it
31. 31.True or false: a string is not needed for the pendulum. (a) False (b) True
32. 32.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a grandfather clock (d) a digital watch
33. 33.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
34. 34.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) no, hardly at all (c) it stops swinging (d) yes, much faster
35. 35.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
36. 36.⚖️ 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
37. 37.True or false: a mirror is not needed for the pendulum. (a) False (b) True
38. 38.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we change it (c) we measure it
40. 40.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True

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