Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 504 · 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) turmeric powder (b) a mirror (c) a magnet (d) a ruler
2. 2.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
3. 3.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
4. 4.⚖️ 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
5. 5.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) about the same (c) much slower (d) it cannot swing
6. 6.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a shorter string (d) a lighter bob
7. 7.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) slower (d) quicker
8. 8.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we change it (c) we measure it
10. 10.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a mirror (c) turmeric powder (d) a battery cell
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) the same hook (c) how far we pull it back (d) the string length
12. 12.🔮 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 doubles (d) it stays the same
13. 13.True or false: a balloon is needed for the pendulum. (a) True (b) False
14. 14.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) it is hot (d) the bob could hit you
15. 15.🧺 Which of these is needed for the pendulum? (a) a magnet (b) yeast (c) a stopwatch (d) turmeric powder
16. 16.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
17. 17.True or false: a string is needed for the pendulum. (a) False (b) True
18. 18.⚖️ 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 same hook (c) time for 10 swings (d) how far we pull it back
19. 19.⚖️ 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 change it (c) we keep it the same
20. 20.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a heavy nut or washer (c) a ruler (d) a pencil and tape
21. 21.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
22. 22.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
23. 23.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
24. 24.True or false: yeast is needed for the pendulum. (a) True (b) False
25. 25.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a balloon (d) a stopwatch
27. 27.🧺 Which of these is not needed for the pendulum? (a) a string (b) a magnet (c) a stopwatch (d) a heavy nut or washer
28. 28.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 18 seconds?
29. 29.⚖️ 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
30. 30.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a heavy brick (d) a small nut or washer
31. 31.⚖️ 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) how far we pull it back
32. 32.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) magnetism (c) the string (d) gravity
33. 33.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
34. 34.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 57 seconds?
35. 35.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) it is more accurate (c) one swing is too slow (d) 10 is a lucky number
36. 36.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
37. 37.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
38. 38.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a grandfather clock (c) a phone (d) a digital watch
39. 39.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
40. 40.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed

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