Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 53 · 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 string (b) a ruler (c) turmeric powder (d) a heavy nut or washer
2. 2.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is magnetic (d) it is hot
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a ruler (d) a battery cell
4. 4.True or false: a battery cell is needed for the pendulum. (a) True (b) False
5. 5.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a heavier bob (d) a longer string
6. 6.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
7. 7.🧺 Which of these is needed for the pendulum? (a) a ruler (b) a battery cell (c) a magnet (d) turmeric powder
8. 8.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) stopped (c) heavier (d) slower
9. 9.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a stopwatch (c) a pencil and tape (d) a string
10. 10.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 57 seconds?
11. 11.⚖️ 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) how far we pull it back (d) time for 10 swings
12. 12.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a grandfather clock (d) a phone
13. 13.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
14. 14.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
15. 15.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we measure it (c) we keep it the same
17. 17.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
18. 18.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) gravity (c) the wind (d) magnetism
19. 19.⚖️ 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
20. 20.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
21. 21.🛟 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
22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) yeast (d) a pencil and tape
23. 23.⚖️ 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
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) time for 10 swings (c) the weight of the bob (d) how far we pull it back
25. 25.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 10 seconds?
26. 26.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 16 seconds?
27. 27.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a heavy nut or washer (c) a ruler (d) a string
28. 28.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
29. 29.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a battery cell (c) a string (d) a mirror
30. 30.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
31. 31.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
32. 32.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it doubles (d) it halves
33. 33.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a balloon (c) a string (d) a stopwatch
34. 34.⚖️ 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
35. 35.⚖️ 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
36. 36.⚖️ 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
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) False (b) True
38. 38.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
39. 39.🔮 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
40. 40.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?

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