Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 665 · 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 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
2. 2.⚖️ 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) the weight of the bob (c) the string length (d) how far we pull it back
3. 3.True or false: a ruler is needed for the pendulum. (a) True (b) False
4. 4.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) magnetism (c) gravity (d) the string
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
6. 6.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) turmeric powder (d) a stopwatch
7. 7.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a balloon (c) a heavy nut or washer (d) a mirror
8. 8.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) turmeric powder (d) a ruler
10. 10.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 17 seconds?
11. 11.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
12. 12.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
13. 13.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a small nut or washer (d) a heavy brick
14. 14.⚖️ 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 keep it the same (c) we change it
15. 15.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a shorter string (d) a lighter bob
16. 16.⚖️ 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
17. 17.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
18. 18.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
19. 19.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a mirror (c) a stopwatch (d) a magnet
20. 20.⚖️ 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
21. 21.⚖️ 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
22. 22.⚖️ 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
23. 23.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a pencil and tape (c) a stopwatch (d) a ruler
24. 24.🕰️ 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
25. 25.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) no, hardly at all (c) yes, much slower (d) yes, much faster
26. 26.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
27. 27.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) it cannot swing (c) about the same (d) much faster
28. 28.True or false: a balloon is needed for the pendulum. (a) False (b) True
29. 29.⚖️ 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
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) False (b) True
32. 32.🔮 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 becomes 4 times (d) it doubles
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) yeast (d) a pencil and tape
34. 34.⚖️ 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
35. 35.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
36. 36.True or false: a mirror is needed for the pendulum. (a) False (b) True
37. 37.🧺 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 balloon
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a stopwatch (d) a magnet
39. 39.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a battery cell (c) yeast (d) a string
40. 40.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 20 seconds?

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