Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 497 · 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 needed for the pendulum? (a) a mirror (b) a heavy nut or washer (c) a magnet (d) a battery cell
2. 2.⚖️ 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 measure it (c) we keep it the same
3. 3.🧺 Which of these is needed for the pendulum? (a) yeast (b) a ruler (c) a balloon (d) turmeric powder
4. 4.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the same hook (c) time for 10 swings
6. 6.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is wet (d) it is magnetic
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) turmeric powder (d) a pencil and tape
8. 8.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 12 seconds?
9. 9.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a stopwatch (c) turmeric powder (d) a heavy nut or washer
10. 10.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) heavier (d) quicker
11. 11.⚖️ 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
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a ruler (c) a pencil and tape (d) a stopwatch
13. 13.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) it is more accurate (c) 10 is a lucky number (d) one swing is too slow
14. 14.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 18 seconds?
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) the weight of the bob (c) time for 10 swings (d) the string length
16. 16.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a longer string (d) a heavier bob
17. 17.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
18. 18.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
19. 19.⚖️ 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
20. 20.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a string (c) yeast (d) a balloon
21. 21.True or false: a magnet is needed for the pendulum. (a) False (b) True
22. 22.True or false: yeast is not needed for the pendulum. (a) False (b) True
23. 23.True or false: a ruler is not needed for the pendulum. (a) False (b) True
24. 24.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
25. 25.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
26. 26.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a phone (d) a grandfather clock
27. 27.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
28. 28.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a sharp tool (c) a glass bottle (d) a heavy brick
29. 29.⚖️ 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) how far we pull it back (c) the string length
30. 30.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 10 seconds?
31. 31.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
32. 32.⚖️ 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) True (b) False
33. 33.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 8 seconds?
34. 34.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
35. 35.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
36. 36.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) a stopwatch (d) yeast
37. 37.⚖️ 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) False (b) True
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a pencil and tape (c) a balloon (d) a string
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) how far we pull it back (b) the weight of the bob (c) time for 10 swings (d) the string length
40. 40.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a pencil and tape (c) a heavy nut or washer (d) a string

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