Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 248 · 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.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) time for 10 swings (c) the same hook (d) the weight of the bob
2. 2.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a pencil and tape (d) a magnet
3. 3.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) quicker (d) stopped
4. 4.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) it is magnetic (d) the bob could hit you
5. 5.⚖️ 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
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a battery cell (c) a heavy nut or washer (d) a pencil and tape
7. 7.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much slower (c) it cannot swing (d) much faster
8. 8.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) one swing is too slow (c) 10 is a lucky number (d) it is more fun
9. 9.⚖️ 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
10. 10.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
11. 11.True or false: a ruler is not needed for the pendulum. (a) True (b) False
12. 12.⚖️ 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
13. 13.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a longer string (d) a heavier bob
14. 14.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
15. 15.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
16. 16.⚖️ 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
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a mirror (c) a stopwatch (d) a heavy nut or washer
19. 19.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a small nut or washer (c) a sharp tool (d) a heavy brick
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a balloon (c) a stopwatch (d) a ruler
21. 21.⚖️ 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
22. 22.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it doubles (d) it stays the same
23. 23.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
24. 24.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) a pencil and tape (d) yeast
26. 26.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
27. 27.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 30 seconds?
28. 28.True or false: a mirror is not needed for the pendulum. (a) True (b) False
29. 29.True or false: a string is needed for the pendulum. (a) True (b) False
30. 30.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
31. 31.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a ruler (c) a balloon (d) a magnet
32. 32.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
33. 33.True or false: a magnet is needed for the pendulum. (a) True (b) False
34. 34.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a battery cell (c) a pencil and tape (d) a stopwatch
35. 35.⚖️ 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
36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) False (b) True
37. 37.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
38. 38.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
39. 39.True or false: yeast is needed for the pendulum. (a) True (b) False
40. 40.⚖️ 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

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