Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 49 · 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 change makes a pendulum swing more slowly? (a) a lighter bob (b) a shorter string (c) a longer string (d) a heavier bob
2. 2.🔮 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
3. 3.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a sharp tool (c) a glass bottle (d) a heavy brick
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) the string length (c) time for 10 swings
5. 5.⚖️ 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
6. 6.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we keep it the same (c) we change it
8. 8.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
9. 9.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) gravity (d) the wind
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) the same hook (c) time for 10 swings (d) the weight of the bob
11. 11.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 22 seconds?
12. 12.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
13. 13.⚖️ 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 keep it the same (c) we change it
14. 14.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
15. 15.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) one swing is too slow (c) it is more accurate (d) 10 is a lucky number
16. 16.⚖️ 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
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) False (b) True
18. 18.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a pencil and tape (d) turmeric powder
19. 19.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) a battery cell (d) a stopwatch
20. 20.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
21. 21.🧺 Which of these is not needed for the pendulum? (a) a string (b) a heavy nut or washer (c) a pencil and tape (d) a magnet
22. 22.🧺 Which of these is needed for the pendulum? (a) a mirror (b) yeast (c) a magnet (d) a pencil and tape
23. 23.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a stopwatch (c) a heavy nut or washer (d) a string
25. 25.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 24 seconds?
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) yeast (d) a heavy nut or washer
27. 27.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
28. 28.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it stays the same (c) it doubles (d) it becomes 4 times
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a string (d) a magnet
30. 30.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) turmeric powder (d) a ruler
31. 31.🛟 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
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) turmeric powder (c) a stopwatch (d) a string
33. 33.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
34. 34.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) yes, much slower (c) it stops swinging (d) no, hardly at all
35. 35.⚖️ 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
36. 36.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
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 string (b) a ruler (c) a stopwatch (d) a mirror
39. 39.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) stopped (d) quicker
40. 40.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed

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