Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 847 · 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) a stopwatch (c) yeast (d) a string
2. 2.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is hot (d) it is magnetic
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we measure it (c) we keep it the same
4. 4.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a grandfather clock (d) a digital watch
5. 5.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a small nut or washer (d) a glass bottle
6. 6.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a magnet (c) a pencil and tape (d) a string
7. 7.⚖️ 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 change it (c) we keep it the same
8. 8.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
9. 9.🧺 Which of these is needed for the pendulum? (a) yeast (b) a string (c) a battery cell (d) a mirror
10. 10.⚖️ 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) False (b) True
11. 11.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
12. 12.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
13. 13.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 7 seconds?
14. 14.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) one swing is too slow (c) it is more fun (d) 10 is a lucky number
15. 15.True or false: a ruler is needed for the pendulum. (a) True (b) False
16. 16.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 9 seconds?
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) the same hook (c) how far we pull it back (d) the string length
18. 18.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a stopwatch (c) a heavy nut or washer (d) turmeric powder
19. 19.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) magnetism (c) the wind (d) the string
20. 20.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a pencil and tape (c) a battery cell (d) a string
22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a magnet (d) a ruler
23. 23.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it stays the same (c) it halves (d) it becomes 4 times
24. 24.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we change it (c) we keep it the same
26. 26.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
27. 27.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
28. 28.⚖️ 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) True (b) False
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) turmeric powder (c) a stopwatch (d) a pencil and tape
30. 30.🕰️ 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
31. 31.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) it cannot swing (c) much faster (d) about the same
32. 32.True or false: a string is needed for the pendulum. (a) True (b) False
33. 33.🧺 Which of these is needed for the pendulum? (a) a mirror (b) turmeric powder (c) a heavy nut or washer (d) a magnet
34. 34.🧺 Which of these is not needed for the pendulum? (a) a string (b) a stopwatch (c) a pencil and tape (d) a battery cell
35. 35.⚖️ 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
36. 36.⚖️ 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
37. 37.⚖️ 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
38. 38.True or false: a ruler is not needed for the pendulum. (a) False (b) True
39. 39.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) slower (d) quicker
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) a mirror (d) a ruler

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