Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 276 · 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 kept the same? (a) the same hook (b) time for 10 swings (c) the string length
2. 2.True or false: a ruler is needed for the pendulum. (a) False (b) True
3. 3.⚖️ 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
4. 4.🧺 Which of these is needed for the pendulum? (a) yeast (b) a mirror (c) a battery cell (d) a stopwatch
5. 5.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) the wind (d) gravity
6. 6.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
7. 7.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
8. 8.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more fun (c) 10 is a lucky number (d) it is more accurate
9. 9.True or false: a magnet is needed for the pendulum. (a) True (b) False
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a heavy nut or washer (d) a battery cell
11. 11.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
12. 12.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) it stops swinging (c) no, hardly at all (d) yes, much faster
13. 13.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a shorter string (d) a lighter bob
14. 14.⚖️ 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
15. 15.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 42 seconds?
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we keep it the same (c) we change it
17. 17.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
18. 18.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it becomes 4 times (d) it stays the same
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) False (b) True
20. 20.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) about the same (c) much slower (d) it cannot swing
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a stopwatch (d) a magnet
22. 22.⚖️ 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) True (b) False
23. 23.⚖️ 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) how far we pull it back (c) time for 10 swings (d) the string length
24. 24.⚖️ 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
25. 25.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
26. 26.True or false: a battery cell is needed for the pendulum. (a) False (b) True
27. 27.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a heavy brick (d) a small nut or washer
28. 28.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
29. 29.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
30. 30.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we measure it (c) we change it
32. 32.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) slower (d) quicker
33. 33.True or false: a string is needed for the pendulum. (a) False (b) True
34. 34.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is wet (c) it is hot (d) it is magnetic
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) turmeric powder (d) a pencil and tape
36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) True (b) False
38. 38.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
39. 39.🧺 Which of these is needed for the pendulum? (a) a balloon (b) turmeric powder (c) a pencil and tape (d) a magnet
40. 40.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?

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