Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 422 · 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.⚖️ 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) the weight of the bob (c) how far we pull it back (d) time for 10 swings
2. 2.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) it cannot swing (c) much slower (d) about the same
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) a magnet (d) a pencil and tape
4. 4.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a small nut or washer (d) a glass bottle
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.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a heavier bob (d) a longer string
7. 7.⚖️ 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
8. 8.True or false: a balloon is needed for the pendulum. (a) False (b) True
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we keep it the same (c) we measure it
10. 10.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) quicker (d) heavier
11. 11.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a digital watch (c) a phone (d) a sundial
12. 12.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
13. 13.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) yeast (d) a pencil and tape
14. 14.⚖️ 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
15. 15.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) a battery cell (d) a heavy nut or washer
17. 17.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
19. 19.⚖️ 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 change it (c) we keep it the same
20. 20.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
21. 21.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
22. 22.🧺 Which of these is needed for the pendulum? (a) a balloon (b) turmeric powder (c) a magnet (d) a heavy nut or washer
23. 23.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 24 seconds?
24. 24.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 14 seconds?
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) how far we pull it back (c) time for 10 swings (d) the string length
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the same hook (c) time for 10 swings
27. 27.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is wet (d) it is magnetic
28. 28.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
29. 29.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it doubles (c) it becomes 4 times (d) it stays the same
30. 30.⚖️ 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
31. 31.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is kept the same. (a) False (b) True
33. 33.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) turmeric powder (d) a ruler
35. 35.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
36. 36.True or false: a ruler is not needed for the pendulum. (a) False (b) True
37. 37.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
38. 38.True or false: a mirror is needed for the pendulum. (a) True (b) False
39. 39.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) one swing is too slow (c) 10 is a lucky number (d) it is more fun
40. 40.⚖️ 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

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