Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 517 · 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.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
2. 2.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) yes, much faster (c) it stops swinging (d) no, hardly at all
3. 3.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
4. 4.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) turmeric powder (c) a magnet (d) yeast
5. 5.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) the bob could hit you (d) it is hot
6. 6.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a battery cell (c) a mirror (d) a string
7. 7.True or false: yeast is not needed for the pendulum. (a) True (b) False
8. 8.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) quicker (d) heavier
9. 9.⚖️ 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
10. 10.True or false: a balloon is needed for the pendulum. (a) False (b) True
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) time for 10 swings (c) the string length (d) how far we pull it back
12. 12.⚖️ 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
13. 13.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a digital watch (c) a phone (d) a sundial
14. 14.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 30 seconds?
15. 15.True or false: a battery cell is needed for the pendulum. (a) False (b) True
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a magnet (d) a stopwatch
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) turmeric powder (d) a pencil and tape
18. 18.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a string (c) a battery cell (d) a pencil and tape
19. 19.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
20. 20.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
21. 21.⚖️ 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
22. 22.⚖️ 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 weight of the bob (c) the string length (d) how far we pull it back
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a mirror (d) a stopwatch
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we change it (c) we measure it
25. 25.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
26. 26.⚖️ 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
27. 27.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a battery cell (c) a heavy nut or washer (d) turmeric powder
28. 28.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) much faster (c) about the same (d) it cannot swing
29. 29.⚖️ 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
30. 30.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
31. 31.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it stays the same (d) it becomes 4 times
32. 32.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a heavy brick (d) a glass bottle
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) yeast (c) a heavy nut or washer (d) a stopwatch
34. 34.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) one swing is too slow (c) it is more accurate (d) 10 is a lucky number
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a ruler (d) a balloon
36. 36.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
37. 37.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 12 seconds?
38. 38.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
39. 39.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a shorter string (d) a longer string
40. 40.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed

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