Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 58 · 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.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) quicker (d) slower
2. 2.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a balloon (c) a mirror (d) yeast
3. 3.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
4. 4.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
5. 5.⚖️ 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) False (b) True
6. 6.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a sharp tool (d) a small nut or washer
7. 7.⚖️ 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
8. 8.True or false: yeast is not needed for the pendulum. (a) False (b) True
9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a heavy nut or washer (c) a string (d) a pencil and tape
10. 10.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) a balloon (d) a heavy nut or washer
11. 11.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 8 seconds?
12. 12.🕰️ 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
13. 13.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it doubles (d) it becomes 4 times
14. 14.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is hot (c) it is magnetic (d) the bob could hit you
15. 15.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) the wind (c) magnetism (d) gravity
16. 16.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a string (c) a ruler (d) a stopwatch
18. 18.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
19. 19.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a phone (d) a grandfather clock
20. 20.True or false: a balloon is not needed for the pendulum. (a) False (b) True
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.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 20 seconds?
23. 23.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a ruler (c) a heavy nut or washer (d) a pencil and tape
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) False (b) True
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) time for 10 swings (c) how far we pull it back (d) the string length
26. 26.🕰️ A pendulum makes 15 swings in 45 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 54 seconds?
28. 28.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
29. 29.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
30. 30.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 15 seconds?
31. 31.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
32. 32.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) yeast (d) a stopwatch
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the same hook (b) how far we pull it back (c) the string length (d) the weight of the bob
35. 35.⚖️ 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
36. 36.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
37. 37.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a balloon (c) a ruler (d) yeast
38. 38.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) a magnet (d) a ruler

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