Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 687 · 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.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) no, hardly at all (c) it stops swinging (d) yes, much faster
2. 2.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is magnetic (d) it is hot
3. 3.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we measure it (c) we keep it the same
5. 5.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
6. 6.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 16 seconds?
7. 7.⚖️ 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
8. 8.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
9. 9.True or false: a battery cell is needed for the pendulum. (a) True (b) False
10. 10.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a digital watch (c) a sundial (d) a grandfather clock
11. 11.⚖️ 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) True (b) False
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) True (b) False
13. 13.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a stopwatch (c) a mirror (d) a string
14. 14.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more accurate (c) it is more fun (d) 10 is a lucky number
15. 15.⚖️ 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) time for 10 swings (d) the same hook
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a heavy nut or washer (d) a magnet
17. 17.⚖️ 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 string length (c) the same hook (d) the weight of the bob
18. 18.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a magnet (c) a battery cell (d) yeast
19. 19.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
20. 20.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
21. 21.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
22. 22.🔮 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
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a pencil and tape (d) a balloon
24. 24.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
25. 25.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) a string (d) turmeric powder
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) True (b) False
28. 28.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a glass bottle (d) a small nut or washer
29. 29.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a ruler (c) a balloon (d) a battery cell
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
31. 31.⚖️ 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
32. 32.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
33. 33.True or false: a string is not needed for the pendulum. (a) False (b) True
34. 34.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a shorter string (d) a longer string
35. 35.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) gravity (c) magnetism (d) the wind
36. 36.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a stopwatch (c) a battery cell (d) a magnet
37. 37.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) about the same (c) much slower (d) it cannot swing
38. 38.True or false: a string is needed for the pendulum. (a) False (b) True
39. 39.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a battery cell (c) a ruler (d) a string
40. 40.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed

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