Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 745 · 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 string length (b) how far we pull it back (c) time for 10 swings
2. 2.True or false: a magnet is needed for the pendulum. (a) True (b) False
3. 3.⚖️ 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
4. 4.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
5. 5.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a battery cell (c) a balloon (d) yeast
6. 6.⚖️ 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) the same hook (d) time for 10 swings
7. 7.⚖️ 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) False (b) True
8. 8.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
9. 9.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is hot (c) the bob could hit you (d) it is magnetic
10. 10.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a stopwatch (d) yeast
11. 11.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
12. 12.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
13. 13.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) a string (d) a battery cell
14. 14.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
15. 15.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
16. 16.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 10 seconds?
17. 17.⚖️ 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
18. 18.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it doubles (c) it becomes 4 times (d) it halves
19. 19.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more accurate (c) 10 is a lucky number (d) it is more fun
20. 20.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we keep it the same (c) we change it
22. 22.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a small nut or washer (c) a sharp tool (d) a glass bottle
23. 23.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) quicker (c) stopped (d) slower
24. 24.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) much slower (d) about the same
25. 25.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a shorter string (c) a heavier bob (d) a lighter bob
26. 26.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) a ruler (d) a magnet
27. 27.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
28. 28.⚖️ 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 keep it the same (c) we measure it
29. 29.⚖️ 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
30. 30.True or false: a string is not needed for the pendulum. (a) False (b) True
31. 31.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much slower (c) yes, much faster (d) it stops swinging
32. 32.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a string (c) a stopwatch (d) a heavy nut or washer
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) the string length (c) the weight of the bob
35. 35.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) turmeric powder (c) a pencil and tape (d) a heavy nut or washer
36. 36.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 54 seconds?
37. 37.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the string (c) magnetism (d) the wind
38. 38.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
39. 39.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 60 seconds?
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) turmeric powder (d) a pencil and tape

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