Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 143 · 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.🛟 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
2. 2.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the string (c) magnetism (d) the wind
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) True (b) False
5. 5.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a longer string (d) a lighter bob
6. 6.⚖️ 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
7. 7.⚖️ 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
8. 8.⚖️ 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) time for 10 swings (d) how far we pull it back
9. 9.True or false: a string is not needed for the pendulum. (a) True (b) False
10. 10.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) heavier (d) slower
11. 11.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
12. 12.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a stopwatch (c) a ruler (d) a balloon
13. 13.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
14. 14.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
15. 15.⚖️ 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
16. 16.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it doubles (c) it becomes 4 times (d) it stays the same
17. 17.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
18. 18.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
19. 19.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a stopwatch (c) a ruler (d) a heavy nut or washer
20. 20.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
21. 21.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a phone (c) a sundial (d) a digital watch
22. 22.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 17 seconds?
23. 23.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
24. 24.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 20 seconds?
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we measure it (c) we keep it the same
26. 26.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 45 seconds?
27. 27.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) a pencil and tape (d) turmeric powder
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) the weight of the bob (c) how far we pull it back (d) the same hook
29. 29.⚖️ 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
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 keep it the same (b) we measure it (c) we change it
31. 31.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
32. 32.True or false: a mirror is needed for the pendulum. (a) False (b) True
33. 33.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
34. 34.True or false: a balloon is not needed for the pendulum. (a) False (b) True
35. 35.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a battery cell (c) turmeric powder (d) a stopwatch
36. 36.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 8 seconds?
37. 37.True or false: a magnet is needed for the pendulum. (a) False (b) True
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) turmeric powder (d) a ruler
39. 39.⚖️ 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
40. 40.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True

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