Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 708 · 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.🧺 Which of these is not needed for the pendulum? (a) a string (b) a stopwatch (c) yeast (d) a pencil and tape
2. 2.⚖️ 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) True (b) False
3. 3.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a sharp tool (c) a heavy brick (d) a glass bottle
4. 4.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?
5. 5.True or false: a string is not needed for the pendulum. (a) False (b) True
6. 6.⚖️ 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
7. 7.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 9 seconds?
8. 8.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
9. 9.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a battery cell (c) a balloon (d) a magnet
10. 10.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a shorter string (c) a heavier bob (d) a longer string
11. 11.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) a ruler (d) a magnet
12. 12.🛟 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
13. 13.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) a magnet (c) a balloon (d) a mirror
14. 14.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
15. 15.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 42 seconds?
16. 16.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it doubles (c) it stays the same (d) it halves
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.True or false: a ruler is not needed for the pendulum. (a) True (b) False
19. 19.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) stopped (d) heavier
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a heavy nut or washer (d) a magnet
21. 21.⚖️ 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) the weight of the bob
22. 22.⚖️ 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
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we measure it (c) we keep it the same
24. 24.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a heavy nut or washer (c) a string (d) a ruler
25. 25.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) yes, much faster (c) no, hardly at all (d) it stops swinging
26. 26.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
27. 27.⚖️ 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 change it (c) we keep it the same
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) how far we pull it back (c) the weight of the bob (d) the string length
29. 29.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
30. 30.⚖️ 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 change it (b) we measure it (c) we keep it the same
31. 31.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
32. 32.True or false: a balloon is needed for the pendulum. (a) True (b) False
33. 33.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
34. 34.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
35. 35.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a magnet (c) a balloon (d) turmeric powder
36. 36.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
37. 37.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) 10 is a lucky number (c) it is more accurate (d) it is more fun
38. 38.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True
40. 40.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a stopwatch (d) a battery cell

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