Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 654 · 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.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
2. 2.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) about the same (d) much slower
3. 3.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a heavy brick (c) a sharp tool (d) a glass bottle
4. 4.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
5. 5.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
6. 6.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) quicker (d) slower
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) a pencil and tape (d) turmeric powder
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) False (b) True
9. 9.True or false: a magnet is needed for the pendulum. (a) False (b) True
10. 10.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a balloon (c) a battery cell (d) a string
11. 11.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
12. 12.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
13. 13.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 33 seconds?
14. 14.⚖️ 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 keep it the same (c) we measure it
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a ruler (c) a heavy nut or washer (d) a string
16. 16.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
17. 17.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a heavy nut or washer (d) a magnet
19. 19.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
20. 20.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the same hook (b) the weight of the bob (c) the string length (d) how far we pull it back
22. 22.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) no, hardly at all (c) yes, much faster (d) it stops swinging
23. 23.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a phone (c) a sundial (d) a grandfather clock
24. 24.🧺 Which of these is needed for the pendulum? (a) yeast (b) a ruler (c) a battery cell (d) a mirror
25. 25.⚖️ 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
26. 26.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it becomes 4 times (c) it stays the same (d) it halves
27. 27.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) 10 is a lucky number (c) it is more accurate (d) it is more fun
28. 28.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a battery cell (c) a balloon (d) a pencil and tape
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
30. 30.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) a mirror (d) a pencil and tape
31. 31.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is magnetic (d) it is wet
32. 32.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a ruler (c) a heavy nut or washer (d) a battery cell
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is the one thing we change. (a) True (b) False
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a balloon (d) a stopwatch
35. 35.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a magnet (d) a heavy nut or washer
36. 36.⚖️ 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 same hook (c) the string length
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a pencil and tape (d) yeast
38. 38.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
39. 39.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
40. 40.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed

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