Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 199 · 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 heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) it cannot swing (c) much faster (d) much slower
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we measure it (c) we keep it the same
3. 3.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a battery cell (c) a heavy nut or washer (d) a ruler
4. 4.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
5. 5.🕰️ 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
6. 6.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
7. 7.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a pencil and tape (d) a balloon
9. 9.🔮 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 stays the same (d) it halves
10. 10.⚖️ 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
11. 11.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
12. 12.⚖️ 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 weight of the bob
13. 13.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a sundial (d) a digital watch
14. 14.⚖️ 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
15. 15.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) a string (d) yeast
16. 16.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
17. 17.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
18. 18.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a shorter string (d) a longer string
19. 19.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a magnet (c) a balloon (d) a pencil and tape
20. 20.True or false: a ruler is not needed for the pendulum. (a) True (b) False
21. 21.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 6 seconds?
22. 22.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is wet (d) it is hot
23. 23.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a pencil and tape (d) a magnet
24. 24.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) quicker (d) heavier
25. 25.⚖️ 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) how far we pull it back (c) the weight of the bob (d) time for 10 swings
26. 26.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
27. 27.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a small nut or washer (d) a heavy brick
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
29. 29.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
30. 30.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) it is more accurate (c) 10 is a lucky number (d) one swing is too slow
31. 31.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
32. 32.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
33. 33.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
34. 34.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
35. 35.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 57 seconds?
36. 36.True or false: a magnet is needed for the pendulum. (a) True (b) False
37. 37.True or false: yeast is not needed for the pendulum. (a) False (b) True
38. 38.⚖️ 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) how far we pull it back (d) the weight of the bob
39. 39.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
40. 40.True or false: a stopwatch is needed for the pendulum. (a) False (b) True

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