Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 950 · 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.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) turmeric powder (c) a string (d) a pencil and tape
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.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
4. 4.⚖️ 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
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) yeast (d) a stopwatch
6. 6.🔮 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 doubles (d) it halves
7. 7.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a small nut or washer (d) a heavy brick
8. 8.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
9. 9.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a heavy nut or washer (c) a balloon (d) turmeric powder
10. 10.⚖️ 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) the weight of the bob
11. 11.⚖️ 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
12. 12.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a magnet (c) a ruler (d) a mirror
13. 13.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) True (b) False
15. 15.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
16. 16.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
17. 17.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a phone (c) a digital watch (d) a grandfather clock
18. 18.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the wind (c) gravity (d) the string
19. 19.🧺 Which of these is needed for the pendulum? (a) yeast (b) a stopwatch (c) a mirror (d) a magnet
20. 20.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
21. 21.⚖️ 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
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) how far we pull it back (c) the string length (d) the weight of the bob
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) turmeric powder (d) a stopwatch
24. 24.⚖️ 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
25. 25.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
26. 26.True or false: a balloon is needed for the pendulum. (a) True (b) False
27. 27.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a stopwatch (c) a pencil and tape (d) a battery cell
28. 28.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 9 seconds?
29. 29.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) it stops swinging (c) yes, much faster (d) no, hardly at all
30. 30.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) heavier (c) slower (d) stopped
31. 31.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
32. 32.True or false: a mirror is needed for the pendulum. (a) False (b) True
33. 33.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
34. 34.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 14 seconds?
35. 35.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
36. 36.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
37. 37.⚖️ 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) True (b) False
38. 38.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we change it (c) we measure it
40. 40.⚖️ 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

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