Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 115 · 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 15 swings in 15 seconds. How many seconds does one swing take?
2. 2.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
3. 3.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) it cannot swing (c) much faster (d) about the same
4. 4.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a battery cell (c) turmeric powder (d) a ruler
5. 5.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we change it (c) we measure it
7. 7.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a ruler (c) a stopwatch (d) a pencil and tape
8. 8.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a grandfather clock (d) a phone
9. 9.⚖️ 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) True (b) False
10. 10.⚖️ 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
11. 11.⚖️ 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
12. 12.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) it is hot (d) the bob could hit you
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a balloon (c) a heavy nut or washer (d) a pencil and tape
14. 14.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
15. 15.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) it stops swinging (c) yes, much faster (d) yes, much slower
16. 16.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?
17. 17.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) True (b) False
19. 19.⚖️ 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
20. 20.True or false: a battery cell is needed for the pendulum. (a) True (b) False
21. 21.⚖️ 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
22. 22.True or false: a magnet is not needed for the pendulum. (a) True (b) False
23. 23.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
24. 24.🧺 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 ruler
25. 25.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the string (c) magnetism (d) the wind
26. 26.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
27. 27.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 18 seconds?
28. 28.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) time for 10 swings (c) the string length
30. 30.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
31. 31.True or false: yeast is needed for the pendulum. (a) False (b) True
32. 32.⚖️ 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) True (b) False
33. 33.⚖️ 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 weight of the bob (c) the same hook (d) time for 10 swings
34. 34.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
35. 35.⚖️ 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
36. 36.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
37. 37.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it halves (d) it doubles
38. 38.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
39. 39.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
40. 40.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a stopwatch (c) a pencil and tape (d) a battery cell

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