Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 820 · 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.🛟 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
2. 2.⚖️ 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
3. 3.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a battery cell (c) a heavy nut or washer (d) a pencil and tape
5. 5.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a lighter bob (c) a shorter string (d) a heavier bob
6. 6.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
7. 7.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a small nut or washer (c) a glass bottle (d) a sharp tool
8. 8.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) it stops swinging (c) yes, much slower (d) no, hardly at all
9. 9.⚖️ 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
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) yeast (d) a ruler
11. 11.⚖️ 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
12. 12.True or false: a balloon is not needed for the pendulum. (a) False (b) True
13. 13.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a sundial (c) a digital watch (d) a phone
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a pencil and tape (d) a balloon
15. 15.🧺 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
16. 16.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is kept the same. (a) True (b) False
18. 18.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a balloon (c) a ruler (d) a mirror
19. 19.🔮 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
20. 20.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
21. 21.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
22. 22.🧺 Which of these is needed for the pendulum? (a) a balloon (b) yeast (c) turmeric powder (d) a stopwatch
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) turmeric powder (d) a stopwatch
24. 24.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
25. 25.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
26. 26.⚖️ 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) True (b) False
27. 27.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a ruler (c) a heavy nut or washer (d) a stopwatch
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the same hook
29. 29.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
30. 30.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) how far we pull it back
32. 32.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
33. 33.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 7 seconds?
34. 34.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
35. 35.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
36. 36.⚖️ 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
37. 37.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) it cannot swing (d) about the same
38. 38.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
39. 39.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
40. 40.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?

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