Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 536 · 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 string is needed for the pendulum. (a) True (b) False
2. 2.⚖️ 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) the string length (c) time for 10 swings (d) the weight of the bob
3. 3.⚖️ 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
4. 4.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) it cannot swing (c) about the same (d) much slower
5. 5.🔮 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 doubles (d) it becomes 4 times
6. 6.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) stopped (d) quicker
7. 7.⚖️ 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
8. 8.⚖️ 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
9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) turmeric powder (c) a heavy nut or washer (d) a string
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a magnet (c) a ruler (d) a string
11. 11.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a digital watch (d) a sundial
12. 12.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a balloon (d) a pencil and tape
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) True (b) False
15. 15.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) the wind (d) gravity
16. 16.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
17. 17.🕰️ 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
18. 18.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a small nut or washer (c) a sharp tool (d) a glass bottle
19. 19.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) yes, much slower (c) it stops swinging (d) no, hardly at all
20. 20.🧺 Which of these is needed for the pendulum? (a) a ruler (b) a mirror (c) a magnet (d) turmeric powder
21. 21.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) it is hot (d) the bob could hit you
22. 22.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) a pencil and tape (d) turmeric powder
23. 23.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
24. 24.⚖️ 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
25. 25.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
26. 26.⚖️ 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 change it (c) we measure it
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) yeast (c) a string (d) a pencil and tape
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is the one thing we change. (a) False (b) True
29. 29.True or false: a ruler is not needed for the pendulum. (a) False (b) True
30. 30.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a heavy nut or washer (c) a balloon (d) yeast
31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a battery cell (d) a stopwatch
32. 32.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
33. 33.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a heavier bob (c) a shorter string (d) a lighter bob
34. 34.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
35. 35.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
36. 36.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
37. 37.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
38. 38.True or false: a balloon is not needed for the pendulum. (a) False (b) True
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a heavy nut or washer (d) a mirror
40. 40.⚖️ 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 change it (c) we keep it the same

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