Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 902 · 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.⚖️ 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) how far we pull it back (c) the weight of the bob (d) the string length
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) the weight of the bob (c) the same hook (d) time for 10 swings
3. 3.⚖️ 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 measure it (c) we change it
4. 4.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is wet (d) it is magnetic
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a pencil and tape (c) a heavy nut or washer (d) a string
6. 6.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) much faster (c) it cannot swing (d) about the same
7. 7.⚖️ 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) False (b) True
8. 8.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
9. 9.🛟 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
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) False (b) True
11. 11.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a digital watch (c) a phone (d) a sundial
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a battery cell (c) a heavy nut or washer (d) a stopwatch
13. 13.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) quicker (d) heavier
14. 14.⚖️ 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) False (b) True
15. 15.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) a mirror (d) a ruler
16. 16.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
17. 17.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
18. 18.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) yes, much faster (c) no, hardly at all (d) it stops swinging
19. 19.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) a magnet (d) a stopwatch
20. 20.⚖️ 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
21. 21.True or false: yeast is needed for the pendulum. (a) True (b) False
22. 22.⚖️ 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) True (b) False
23. 23.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 12 seconds?
24. 24.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
25. 25.True or false: a mirror is needed for the pendulum. (a) True (b) False
26. 26.True or false: a mirror is not needed for the pendulum. (a) True (b) False
27. 27.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
29. 29.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the wind (c) gravity (d) the string
30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a string (d) a magnet
31. 31.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
32. 32.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
33. 33.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
34. 34.🔮 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
35. 35.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
36. 36.⚖️ 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 weight of the bob (c) the string length
37. 37.True or false: a string is not needed for the pendulum. (a) True (b) False
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) yeast (d) a ruler
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a heavy nut or washer (d) a balloon
40. 40.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a string (c) a pencil and tape (d) a magnet

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