Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 577 · 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.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) heavier (d) slower
2. 2.🔮 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
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a battery cell (c) a stopwatch (d) a ruler
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) a pencil and tape (d) a magnet
5. 5.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a sharp tool (d) a small nut or washer
6. 6.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) it stops swinging (c) yes, much faster (d) no, hardly at all
7. 7.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a battery cell (c) a balloon (d) a magnet
8. 8.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
9. 9.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
10. 10.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we change it (c) we keep it the same
12. 12.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a pencil and tape (c) a battery cell (d) a balloon
13. 13.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
14. 14.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) it is magnetic (d) the bob could hit you
15. 15.⚖️ 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
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a ruler (d) turmeric powder
17. 17.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 16 seconds?
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is kept the same. (a) False (b) True
19. 19.⚖️ 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) time for 10 swings (c) the weight of the bob (d) the same hook
20. 20.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
21. 21.True or false: a magnet is not needed for the pendulum. (a) True (b) False
22. 22.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
23. 23.⚖️ 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
24. 24.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
25. 25.🧺 Which of these is needed for the pendulum? (a) yeast (b) a ruler (c) a mirror (d) a balloon
26. 26.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a longer string (c) a heavier bob (d) a shorter string
27. 27.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
28. 28.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a pencil and tape (c) a heavy nut or washer (d) a stopwatch
29. 29.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 20 seconds?
30. 30.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) a mirror (d) a heavy nut or washer
31. 31.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) the wind (c) gravity (d) magnetism
32. 32.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 42 seconds?
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) the same hook (c) time for 10 swings (d) how far we pull it back
34. 34.🕰️ 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
35. 35.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
36. 36.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a stopwatch (c) a ruler (d) a battery cell
37. 37.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 14 seconds?
38. 38.True or false: a ruler is not needed for the pendulum. (a) False (b) True
39. 39.True or false: a ruler is needed for the pendulum. (a) False (b) True
40. 40.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?

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