Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 571 · 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? True or false: the weight of the bob is the one thing we change. (a) True (b) False
2. 2.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much slower (c) yes, much faster (d) it stops swinging
3. 3.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a sundial (d) a phone
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a balloon (d) a pencil and tape
5. 5.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much slower (c) much faster (d) it cannot swing
6. 6.🧺 Which of these is not needed for the pendulum? (a) a string (b) a heavy nut or washer (c) a mirror (d) a pencil and tape
7. 7.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 10 seconds?
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we change it (c) we keep it the same
9. 9.🔮 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
10. 10.🕰️ 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 fun (d) it is more accurate
11. 11.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) heavier (d) quicker
12. 12.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a heavy brick (d) a small nut or washer
13. 13.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
14. 14.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 12 seconds?
15. 15.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
16. 16.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 12 seconds?
17. 17.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a magnet (c) a battery cell (d) a pencil and tape
18. 18.⚖️ 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
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a string (c) a stopwatch (d) a pencil and tape
20. 20.⚖️ 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 keep it the same (c) we measure it
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) the string length (c) how far we pull it back (d) time for 10 swings
22. 22.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
23. 23.🧺 Which of these is not needed for the pendulum? (a) a string (b) turmeric powder (c) a stopwatch (d) a heavy nut or washer
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a pencil and tape (d) yeast
25. 25.⚖️ 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 keep it the same (b) we change it (c) we measure it
26. 26.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
27. 27.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
28. 28.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a balloon (d) a pencil and tape
29. 29.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?
30. 30.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
31. 31.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a string (c) a pencil and tape (d) a ruler
32. 32.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 16 seconds?
33. 33.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) yeast (d) a heavy nut or washer
34. 34.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
35. 35.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) turmeric powder (d) a string
36. 36.⚖️ 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
37. 37.⚖️ 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
38. 38.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
39. 39.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) turmeric powder (d) a pencil and tape

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