Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 746 · 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 balloon is needed for the pendulum. (a) True (b) False
2. 2.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it halves (d) it doubles
3. 3.⚖️ 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) the same hook
4. 4.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
5. 5.⚖️ 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 measure it (c) we change it
6. 6.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) about the same (d) much slower
7. 7.True or false: yeast is not needed for the pendulum. (a) False (b) True
8. 8.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 34 seconds?
9. 9.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a magnet (c) a string (d) a ruler
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a pencil and tape (c) a heavy nut or washer (d) a string
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we keep it the same (c) we measure it
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
13. 13.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a lighter bob (d) a heavier bob
14. 14.⚖️ 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) the same hook
15. 15.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a pencil and tape (c) yeast (d) a magnet
16. 16.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
17. 17.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
18. 18.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
19. 19.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
20. 20.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
21. 21.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a digital watch (d) a grandfather clock
22. 22.⚖️ 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 weight of the bob (c) the string length
23. 23.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
24. 24.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
25. 25.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) quicker (d) heavier
26. 26.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more accurate (c) it is more fun (d) one swing is too slow
27. 27.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) the bob could hit you (d) it is wet
28. 28.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) False (b) True
30. 30.⚖️ 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) True (b) False
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 measure it (b) we keep it the same (c) we change it
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) turmeric powder (d) a heavy nut or washer
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) yeast (c) a stopwatch (d) a pencil and tape
34. 34.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
35. 35.⚖️ 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
36. 36.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
37. 37.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) no, hardly at all (c) yes, much faster (d) it stops swinging
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a heavy nut or washer (d) a battery cell
39. 39.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a small nut or washer (d) a sharp tool
40. 40.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the string (c) magnetism (d) the wind

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