Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 676 · 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.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it doubles (c) it becomes 4 times (d) it halves
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
3. 3.⚖️ 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
4. 4.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
5. 5.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) a string (d) a balloon
6. 6.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
7. 7.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much slower (c) no, hardly at all (d) yes, much faster
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a string (c) a pencil and tape (d) a stopwatch
9. 9.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
10. 10.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) a ruler (d) turmeric powder
11. 11.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a balloon (c) yeast (d) turmeric powder
12. 12.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) the wind (d) gravity
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) the string length (c) time for 10 swings
14. 14.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a phone (d) a sundial
15. 15.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
16. 16.⚖️ 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 change it (c) we keep it the same
17. 17.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) about the same (d) much faster
18. 18.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
19. 19.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a glass bottle (d) a small nut or washer
20. 20.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
21. 21.⚖️ 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 string length (c) the same hook
22. 22.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
23. 23.⚖️ 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
24. 24.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
25. 25.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a ruler (c) a heavy nut or washer (d) a string
26. 26.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is hot (d) it is wet
27. 27.⚖️ 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
28. 28.🕰️ 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
29. 29.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 16 seconds?
30. 30.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
31. 31.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) heavier (d) slower
32. 32.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
33. 33.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 33 seconds?
34. 34.True or false: a battery cell is needed for the pendulum. (a) True (b) False
35. 35.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
36. 36.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
37. 37.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) the same hook (c) time for 10 swings (d) how far we pull it back
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) time for 10 swings (c) how far we pull it back (d) the weight of the bob
40. 40.⚖️ 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

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