Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 757 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) a ruler (d) a mirror
2. 2.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
3. 3.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
4. 4.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) False (b) True
6. 6.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 32 seconds?
7. 7.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) heavier (d) quicker
8. 8.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
9. 9.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
10. 10.🔮 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 becomes 4 times (d) it doubles
11. 11.True or false: a mirror is needed for the pendulum. (a) True (b) False
12. 12.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a mirror (c) a balloon (d) a ruler
13. 13.⚖️ 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 change it (c) we keep it the same
14. 14.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a mirror (c) a heavy nut or washer (d) a ruler
15. 15.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a pencil and tape (c) yeast (d) a balloon
16. 16.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
17. 17.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
18. 18.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a small nut or washer (d) a heavy brick
19. 19.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a heavy nut or washer (c) turmeric powder (d) a battery cell
20. 20.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a string (d) a balloon
22. 22.True or false: a ruler is not needed for the pendulum. (a) True (b) False
23. 23.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
24. 24.🧺 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) yeast
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we measure it (c) we change it
26. 26.⚖️ 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
27. 27.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the wind (c) gravity (d) the string
28. 28.True or false: a string is needed for the pendulum. (a) False (b) True
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) how far we pull it back (c) the string length (d) the same hook
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) the string length (c) time for 10 swings
31. 31.True or false: a mirror is not needed for the pendulum. (a) True (b) False
32. 32.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) a heavy nut or washer (d) a battery cell
33. 33.⚖️ 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) time for 10 swings (c) the string length
34. 34.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) it cannot swing (c) much slower (d) about the same
35. 35.🧺 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) a string (d) a magnet
36. 36.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
37. 37.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) the bob could hit you (d) it is hot
38. 38.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
39. 39.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a longer string (d) a shorter string
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a battery cell (d) a pencil and tape

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