Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 128 · 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 pendulum takes 1 second for one swing. How many swings does it make in 6 seconds?
2. 2.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it doubles (d) it becomes 4 times
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a ruler (d) yeast
4. 4.True or false: yeast is needed for the pendulum. (a) True (b) False
5. 5.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is magnetic (c) it is hot (d) it is wet
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a battery cell (d) a heavy nut or washer
7. 7.🛟 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
8. 8.⚖️ 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 measure it (c) we change it
9. 9.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 57 seconds?
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) False (b) True
11. 11.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more fun (c) one swing is too slow (d) it is more accurate
12. 12.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) turmeric powder (d) a string
14. 14.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a longer string (c) a heavier bob (d) a shorter string
15. 15.True or false: a ruler is not needed for the pendulum. (a) False (b) True
16. 16.🧺 Which of these is needed for the pendulum? (a) yeast (b) a string (c) a magnet (d) a battery cell
17. 17.⚖️ 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) True (b) False
18. 18.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much slower (c) yes, much faster (d) no, hardly at all
19. 19.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a phone (d) a grandfather clock
20. 20.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
21. 21.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
22. 22.⚖️ 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
23. 23.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a stopwatch (c) a ruler (d) a pencil and tape
24. 24.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) quicker (d) slower
25. 25.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) how far we pull it back (b) the weight of the bob (c) the string length (d) the same hook
27. 27.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 30 seconds?
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) time for 10 swings (c) the string length
29. 29.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
30. 30.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
31. 31.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
32. 32.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we change it (c) we measure it
34. 34.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) the string (c) magnetism (d) gravity
35. 35.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
36. 36.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 24 seconds?
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we change it (c) we keep it the same
38. 38.True or false: yeast is not needed for the pendulum. (a) False (b) True
39. 39.🧺 Which of these is needed for the pendulum? (a) a balloon (b) yeast (c) a pencil and tape (d) a mirror
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a ruler (d) a mirror

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