Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 993 · 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 hot (b) the bob could hit you (c) it is magnetic (d) it is wet
2. 2.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a stopwatch (d) a magnet
3. 3.True or false: a string is not needed for the pendulum. (a) False (b) True
4. 4.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
5. 5.⚖️ 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 string length (c) how far we pull it back (d) time for 10 swings
6. 6.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
7. 7.True or false: a string is needed for the pendulum. (a) False (b) True
8. 8.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
9. 9.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) slower (d) quicker
10. 10.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) about the same (c) much faster (d) much slower
11. 11.⚖️ 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) True (b) False
12. 12.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
13. 13.⚖️ 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
14. 14.⚖️ 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) True (b) False
15. 15.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) a pencil and tape (d) yeast
16. 16.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 27 seconds?
17. 17.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more fun (c) it is more accurate (d) one swing is too slow
18. 18.⚖️ 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
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a ruler (d) a balloon
20. 20.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?
21. 21.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) a mirror (d) a pencil and tape
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we measure it (c) we keep it the same
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 keep it the same (b) we measure it (c) we change it
24. 24.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
25. 25.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
26. 26.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
27. 27.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it halves (d) it doubles
28. 28.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a grandfather clock (c) a phone (d) a digital watch
29. 29.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 54 seconds?
30. 30.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) magnetism (c) gravity (d) the string
31. 31.⚖️ 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
32. 32.⚖️ 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
33. 33.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
34. 34.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) yeast (c) a heavy nut or washer (d) a magnet
35. 35.🛟 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
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a pencil and tape (d) a battery cell
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a mirror (c) a ruler (d) a pencil and tape
38. 38.⚖️ 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 string length (c) the weight of the bob (d) time for 10 swings
39. 39.True or false: a balloon is needed for the pendulum. (a) False (b) True
40. 40.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?

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