Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 384 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a ruler (d) a magnet
2. 2.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) gravity (d) the wind
3. 3.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
4. 4.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a small nut or washer (d) a sharp tool
5. 5.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) stopped (d) heavier
6. 6.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is wet (d) it is magnetic
7. 7.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
8. 8.⚖️ 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
9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a balloon (d) a stopwatch
10. 10.🧺 Which of these is needed for the pendulum? (a) yeast (b) a battery cell (c) a magnet (d) a ruler
11. 11.⚖️ 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 measure it (c) we keep it the same
12. 12.🧺 Which of these is not needed for the pendulum? (a) a string (b) yeast (c) a ruler (d) a pencil and tape
13. 13.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) it cannot swing (c) about the same (d) much faster
14. 14.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) one swing is too slow (c) 10 is a lucky number (d) it is more accurate
15. 15.⚖️ 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 change it (b) we measure it (c) we keep it the same
16. 16.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
17. 17.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it stays the same (c) it becomes 4 times (d) it doubles
18. 18.⚖️ 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
19. 19.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a balloon (c) a string (d) turmeric powder
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a battery cell (d) a stopwatch
21. 21.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
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 string length (c) how far we pull it back
23. 23.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
24. 24.⚖️ 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
25. 25.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a string (c) a heavy nut or washer (d) a stopwatch
26. 26.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
27. 27.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
28. 28.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a mirror (c) a pencil and tape (d) a string
29. 29.True or false: a magnet is not needed for the pendulum. (a) True (b) False
30. 30.⚖️ 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
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is the one thing we change. (a) False (b) True
33. 33.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
34. 34.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
35. 35.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
36. 36.⚖️ 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
37. 37.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 11 seconds?
38. 38.True or false: a battery cell is needed for the pendulum. (a) True (b) False
39. 39.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a digital watch (c) a sundial (d) a grandfather clock
40. 40.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a magnet (c) a stopwatch (d) a string

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