Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 874 · 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.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
2. 2.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it doubles (c) it becomes 4 times (d) it stays the same
3. 3.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a sharp tool (c) a glass bottle (d) a heavy brick
4. 4.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a grandfather clock (c) a phone (d) a digital watch
5. 5.True or false: yeast is not needed for the pendulum. (a) True (b) False
6. 6.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) quicker (c) stopped (d) slower
7. 7.⚖️ 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
8. 8.⚖️ 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
9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a heavy nut or washer (d) a balloon
10. 10.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) about the same (d) it cannot swing
11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a stopwatch (d) yeast
12. 12.🧺 Which of these is needed for the pendulum? (a) a mirror (b) yeast (c) a pencil and tape (d) a magnet
13. 13.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a longer string (d) a shorter string
14. 14.⚖️ 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 same hook (d) the weight of the bob
15. 15.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) False (b) True
17. 17.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a heavy nut or washer (c) turmeric powder (d) a balloon
18. 18.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a heavy nut or washer (d) turmeric powder
20. 20.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we change it (c) we keep it the same
22. 22.⚖️ 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
23. 23.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
24. 24.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
25. 25.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
26. 26.True or false: a ruler is needed for the pendulum. (a) False (b) True
27. 27.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a stopwatch (c) a mirror (d) a balloon
28. 28.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a ruler (c) a mirror (d) a balloon
29. 29.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 48 seconds?
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) the string length (c) how far we pull it back (d) time for 10 swings
31. 31.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) the bob could hit you (d) it is hot
32. 32.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) yes, much slower (c) it stops swinging (d) no, hardly at all
33. 33.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
34. 34.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a magnet (d) a heavy nut or washer
36. 36.⚖️ 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 change it (c) we keep it the same
37. 37.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
38. 38.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the string (d) the wind
39. 39.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
40. 40.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 13 seconds?

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