Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 310 · 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 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it stays the same (d) it doubles
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.🕰️ 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) one swing is too slow (d) it is more fun
4. 4.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
5. 5.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a shorter string (d) a longer string
6. 6.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
7. 7.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) it is wet (d) the bob could hit you
8. 8.🛟 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
9. 9.🧺 Which of these is not needed for the pendulum? (a) a string (b) a pencil and tape (c) a magnet (d) a stopwatch
10. 10.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much slower (c) yes, much faster (d) it stops swinging
11. 11.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
12. 12.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
13. 13.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) a mirror (d) a stopwatch
15. 15.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a grandfather clock (d) a phone
16. 16.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a ruler (c) a magnet (d) yeast
17. 17.True or false: a mirror is needed for the pendulum. (a) False (b) True
18. 18.⚖️ 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
19. 19.🧺 Which of these is needed for the pendulum? (a) a magnet (b) turmeric powder (c) yeast (d) a pencil and tape
20. 20.True or false: a string is needed for the pendulum. (a) True (b) False
21. 21.True or false: a balloon is needed for the pendulum. (a) False (b) True
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.⚖️ 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
24. 24.🔮 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
25. 25.True or false: a ruler is not needed for the pendulum. (a) True (b) False
26. 26.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
27. 27.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) slower (d) heavier
28. 28.⚖️ 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 keep it the same (c) we measure it
29. 29.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 45 seconds?
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) the string length (c) the weight of the bob (d) time for 10 swings
31. 31.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
32. 32.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
33. 33.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a string (c) a stopwatch (d) a heavy nut or washer
34. 34.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
35. 35.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
36. 36.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) a heavy nut or washer (d) a balloon
37. 37.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
38. 38.True or false: a battery cell is needed for the pendulum. (a) True (b) False
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) yeast (c) a stopwatch (d) a string
40. 40.⚖️ 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

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