Simple Pendulum Experiment Worksheet

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

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