Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 334 · 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.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) slower (d) quicker
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) False (b) True
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) turmeric powder (d) a heavy nut or washer
4. 4.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a small nut or washer (d) a glass bottle
5. 5.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we keep it the same (c) we change it
7. 7.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a heavier bob (c) a lighter bob (d) a shorter string
8. 8.True or false: a balloon is needed for the pendulum. (a) True (b) False
9. 9.🔮 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
10. 10.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
11. 11.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
12. 12.⚖️ 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
13. 13.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
14. 14.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a sundial (d) a digital watch
15. 15.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a pencil and tape (c) a magnet (d) a string
16. 16.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
17. 17.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) about the same (c) it cannot swing (d) much slower
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) the string length (c) time for 10 swings
19. 19.True or false: a mirror is needed for the pendulum. (a) False (b) True
20. 20.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
21. 21.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) 10 is a lucky number (c) one swing is too slow (d) it is more accurate
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) the string length (c) time for 10 swings
23. 23.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 32 seconds?
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) the same hook (c) the string length (d) the weight of the bob
25. 25.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a heavy nut or washer (c) a battery cell (d) a magnet
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we change it (c) we keep it the same
27. 27.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
28. 28.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 17 seconds?
29. 29.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
30. 30.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is hot (c) it is magnetic (d) the bob could hit you
31. 31.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) the wind (d) gravity
32. 32.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) it stops swinging (c) yes, much faster (d) no, hardly at all
33. 33.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) yeast (d) a string
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a pencil and tape (d) a mirror
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a pencil and tape (d) a balloon
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a ruler (d) yeast
37. 37.True or false: a battery cell is needed for the pendulum. (a) True (b) False
38. 38.True or false: a ruler is needed for the pendulum. (a) True (b) False
39. 39.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
40. 40.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a heavy nut or washer (c) a ruler (d) a string

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