Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 157 · 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.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
2. 2.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) it is more accurate (c) one swing is too slow (d) 10 is a lucky number
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) how far we pull it back (c) the string length (d) the same hook
4. 4.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a heavy nut or washer (d) a mirror
5. 5.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
6. 6.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much faster (c) much slower (d) it cannot swing
7. 7.⚖️ 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
8. 8.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) quicker (d) slower
9. 9.⚖️ 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) True (b) False
10. 10.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
11. 11.⚖️ 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
12. 12.⚖️ 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
13. 13.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the wind (c) the string (d) gravity
14. 14.True or false: yeast is not needed for the pendulum. (a) False (b) True
15. 15.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it stays the same (c) it becomes 4 times (d) it halves
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a heavy nut or washer (d) a battery cell
17. 17.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a magnet (c) turmeric powder (d) a pencil and tape
18. 18.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) it is hot (d) the bob could hit you
19. 19.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a battery cell (d) a string
20. 20.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a shorter string (d) a longer string
21. 21.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
22. 22.⚖️ 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
23. 23.True or false: a balloon is needed for the pendulum. (a) True (b) False
24. 24.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
25. 25.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
26. 26.🛟 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
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) False (b) True
28. 28.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
29. 29.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
30. 30.⚖️ 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
31. 31.⚖️ 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) time for 10 swings (c) how far we pull it back (d) the same hook
32. 32.🧺 Which of these is not needed for the pendulum? (a) a string (b) a stopwatch (c) a heavy nut or washer (d) a balloon
33. 33.⚖️ 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
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “how far we pull it back”? (a) we keep it the same (b) we change it (c) we measure it
35. 35.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a magnet (c) a ruler (d) a string
36. 36.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
37. 37.⚖️ 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) how far we pull it back
38. 38.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
39. 39.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
40. 40.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a string (c) a stopwatch (d) a ruler

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