Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 946 · 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.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) magnetism (c) the string (d) the wind
2. 2.🧺 Which of these is not needed for the pendulum? (a) a string (b) a stopwatch (c) a ruler (d) turmeric powder
3. 3.⚖️ 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
4. 4.True or false: a string is not needed for the pendulum. (a) False (b) True
5. 5.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
6. 6.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
7. 7.True or false: a string is needed for the pendulum. (a) True (b) False
8. 8.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a glass bottle (d) a heavy brick
9. 9.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
10. 10.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a digital watch (c) a grandfather clock (d) a sundial
11. 11.True or false: a ruler is needed for the pendulum. (a) True (b) False
12. 12.⚖️ 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 same hook (c) time for 10 swings (d) the string length
13. 13.⚖️ 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) the weight of the bob
14. 14.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) quicker (c) slower (d) stopped
15. 15.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a balloon (c) a string (d) a stopwatch
16. 16.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) about the same (c) much faster (d) much slower
17. 17.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a balloon (c) a pencil and tape (d) yeast
18. 18.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is wet (d) it is hot
19. 19.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
20. 20.True or false: a battery cell is needed for the pendulum. (a) False (b) True
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
22. 22.🧺 Which of these is not needed for the pendulum? (a) a string (b) a battery cell (c) a heavy nut or washer (d) a pencil and tape
23. 23.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
24. 24.🧺 Which of these is needed for the pendulum? (a) yeast (b) a heavy nut or washer (c) a battery cell (d) a balloon
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) the string length (c) time for 10 swings
26. 26.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a stopwatch (d) a battery cell
28. 28.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a stopwatch (c) a balloon (d) a mirror
29. 29.⚖️ 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
30. 30.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 6 seconds?
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we keep it the same (c) we measure it
32. 32.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
33. 33.⚖️ 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) True (b) False
34. 34.⚖️ 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
35. 35.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a magnet (c) yeast (d) a ruler
36. 36.⚖️ 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
37. 37.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it halves (c) it stays the same (d) it doubles
38. 38.True or false: a balloon is needed for the pendulum. (a) False (b) True
39. 39.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much faster (c) yes, much slower (d) it stops swinging
40. 40.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a ruler (c) a string (d) a magnet

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