Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 862 · 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.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) a battery cell (d) a pencil and tape
2. 2.True or false: a battery cell is needed for the pendulum. (a) True (b) False
3. 3.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a sharp tool (d) a small nut or washer
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a magnet (c) a ruler (d) a pencil and tape
5. 5.True or false: a mirror is not needed for the pendulum. (a) False (b) True
6. 6.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
7. 7.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
8. 8.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
9. 9.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) one swing is too slow (c) it is more accurate (d) it is more fun
10. 10.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 24 seconds?
11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a mirror (d) a ruler
12. 12.⚖️ 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) how far we pull it back (c) the same hook (d) the string length
13. 13.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a shorter string (d) a longer string
14. 14.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it doubles (c) it halves (d) it stays the same
15. 15.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a heavy nut or washer (c) a pencil and tape (d) a string
16. 16.🔮 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
17. 17.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
18. 18.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
19. 19.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we change it (c) we measure it
21. 21.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
22. 22.⚖️ 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
23. 23.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
24. 24.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a sundial (c) a digital watch (d) a phone
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we change it (c) we keep it the same
26. 26.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) the bob could hit you (d) it is hot
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a stopwatch (c) a ruler (d) a string
28. 28.True or false: a string is needed for the pendulum. (a) False (b) True
29. 29.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?
30. 30.🧺 Which of these is not needed for the pendulum? (a) a string (b) turmeric powder (c) a stopwatch (d) a pencil and tape
31. 31.⚖️ 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) True (b) False
32. 32.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) it stops swinging (c) no, hardly at all (d) yes, much slower
33. 33.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a magnet (c) a string (d) a battery cell
34. 34.⚖️ 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
35. 35.🧺 Which of these is needed for the pendulum? (a) yeast (b) a battery cell (c) a mirror (d) a ruler
36. 36.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
37. 37.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a mirror (c) a ruler (d) a string
38. 38.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
39. 39.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True

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