Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 417 · 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.⚖️ 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
2. 2.True or false: a battery cell is needed for the pendulum. (a) True (b) False
3. 3.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is wet (c) it is hot (d) it is magnetic
4. 4.True or false: a ruler is needed for the pendulum. (a) False (b) True
5. 5.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) quicker (d) slower
6. 6.⚖️ 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 keep it the same (c) we change it
7. 7.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) gravity (c) magnetism (d) the wind
8. 8.⚖️ 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) the same hook (c) the weight of the bob (d) how far we pull it back
9. 9.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 20 seconds?
10. 10.⚖️ 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
11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) a stopwatch (d) yeast
12. 12.⚖️ 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
13. 13.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much faster (c) no, hardly at all (d) yes, much slower
14. 14.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
15. 15.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) it cannot swing (c) much slower (d) much faster
16. 16.🔮 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 doubles (d) it becomes 4 times
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a magnet (d) a ruler
18. 18.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a ruler (c) a stopwatch (d) a pencil and tape
20. 20.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a stopwatch (c) a pencil and tape (d) a ruler
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we measure it (c) we keep it the same
22. 22.🧺 Which of these is needed for the pendulum? (a) a ruler (b) a balloon (c) turmeric powder (d) a mirror
23. 23.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
24. 24.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
25. 25.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) yeast (d) a string
26. 26.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
27. 27.True or false: a magnet is not needed for the pendulum. (a) True (b) False
28. 28.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
29. 29.⚖️ 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
30. 30.🧺 Which of these is needed for the pendulum? (a) yeast (b) a magnet (c) a pencil and tape (d) turmeric powder
31. 31.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?
32. 32.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
33. 33.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a small nut or washer (d) a heavy brick
34. 34.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) 10 is a lucky number (c) it is more fun (d) one swing is too slow
35. 35.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a grandfather clock (c) a phone (d) a digital watch
36. 36.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
37. 37.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
38. 38.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True
40. 40.True or false: a mirror is needed for the pendulum. (a) True (b) False

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