Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 324 · 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.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) one swing is too slow (c) it is more accurate (d) it is more fun
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) True (b) False
3. 3.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
4. 4.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a battery cell (c) a string (d) a stopwatch
5. 5.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it doubles (d) it halves
6. 6.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a balloon (c) a ruler (d) a stopwatch
8. 8.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) it is hot (d) the bob could hit you
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
10. 10.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a mirror (c) a stopwatch (d) a string
11. 11.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a battery cell (c) a balloon (d) a heavy nut or washer
12. 12.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
13. 13.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) about the same (d) it cannot swing
14. 14.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 57 seconds?
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) False (b) True
16. 16.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) how far we pull it back (c) the string length (d) the same hook
18. 18.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) a battery cell (d) a ruler
19. 19.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a small nut or washer (d) a sharp tool
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 measure it (c) we keep it the same
21. 21.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) time for 10 swings (c) how far we pull it back (d) the string length
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a battery cell (c) a pencil and tape (d) a ruler
24. 24.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 18 seconds?
25. 25.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a phone (d) a grandfather clock
26. 26.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
27. 27.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a heavier bob (d) a lighter bob
28. 28.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a ruler (c) a magnet (d) a stopwatch
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) turmeric powder (d) a string
30. 30.True or false: a magnet is not needed for the pendulum. (a) True (b) False
31. 31.⚖️ 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
32. 32.⚖️ 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 measure it (c) we keep it the same
33. 33.True or false: yeast is not needed for the pendulum. (a) True (b) False
34. 34.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is the one thing we change. (a) False (b) True
36. 36.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) gravity (d) the wind
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) True (b) False
38. 38.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
39. 39.True or false: a ruler is not needed for the pendulum. (a) False (b) True
40. 40.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a balloon (c) a magnet (d) yeast

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