Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 325 · 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 fun (b) 10 is a lucky number (c) one swing is too slow (d) it is more accurate
2. 2.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) stopped (d) heavier
3. 3.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
4. 4.True or false: a ruler is not needed for the pendulum. (a) True (b) False
5. 5.⚖️ 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
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a pencil and tape (d) a balloon
7. 7.🕰️ 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
8. 8.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
9. 9.🧺 Which of these is needed for the pendulum? (a) a mirror (b) turmeric powder (c) a pencil and tape (d) a magnet
10. 10.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
11. 11.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
12. 12.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
13. 13.⚖️ 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
14. 14.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
15. 15.True or false: a magnet is needed for the pendulum. (a) True (b) False
16. 16.⚖️ 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
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we measure it (c) we change it
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “how far we pull it back”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 16 seconds?
20. 20.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
21. 21.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) it is wet (d) the bob could hit you
22. 22.⚖️ 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 keep it the same (c) we measure it
23. 23.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
24. 24.True or false: a pencil and tape is needed for the pendulum. (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 weight of the bob (b) the same hook (c) the string length (d) how far we pull it back
26. 26.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a digital watch (d) a grandfather clock
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) time for 10 swings (c) the string length (d) how far we pull it back
28. 28.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a longer string (d) a shorter string
29. 29.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
30. 30.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 8 seconds?
31. 31.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a heavy brick (d) a sharp tool
32. 32.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) the wind (d) gravity
33. 33.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a heavy nut or washer (c) a ruler (d) a pencil and tape
34. 34.🧺 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) yeast (d) a stopwatch
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a magnet (d) a heavy nut or washer
36. 36.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a magnet (d) a stopwatch
37. 37.⚖️ 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
38. 38.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
39. 39.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) much faster (c) about the same (d) it cannot swing
40. 40.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed

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