Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 475 · 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.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) gravity (c) the string (d) magnetism
2. 2.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) turmeric powder (d) a heavy nut or washer
3. 3.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
4. 4.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) it is more fun (c) 10 is a lucky number (d) one swing is too slow
5. 5.⚖️ 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
6. 6.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
7. 7.⚖️ 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
8. 8.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a heavy brick (d) a glass bottle
9. 9.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
10. 10.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) it cannot swing (c) about the same (d) much slower
11. 11.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 24 seconds?
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) turmeric powder (d) a pencil and tape
13. 13.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) a magnet (d) a ruler
14. 14.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a shorter string (c) a heavier bob (d) a lighter bob
15. 15.True or false: a string is needed for the pendulum. (a) True (b) False
16. 16.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a pencil and tape (c) a string (d) a stopwatch
17. 17.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is wet (d) it is magnetic
18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a ruler (c) a stopwatch (d) a string
19. 19.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) no, hardly at all (c) it stops swinging (d) yes, much slower
20. 20.⚖️ 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) how far we pull it back (c) the same hook (d) the string length
21. 21.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a grandfather clock (d) a digital watch
22. 22.True or false: a string is not needed for the pendulum. (a) False (b) True
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a magnet (c) a stopwatch (d) a heavy nut or washer
24. 24.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
25. 25.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
26. 26.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
27. 27.🧺 Which of these is needed for the pendulum? (a) a magnet (b) turmeric powder (c) a pencil and tape (d) a mirror
28. 28.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
29. 29.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 12 seconds?
30. 30.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
31. 31.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
32. 32.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it doubles (c) it stays the same (d) it becomes 4 times
33. 33.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?
34. 34.⚖️ 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
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) a mirror (d) a string
36. 36.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a balloon (c) a stopwatch (d) a pencil and tape
38. 38.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 9 seconds?
39. 39.⚖️ 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) the same hook (c) the string length (d) the weight of the bob
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) the string length (c) time for 10 swings

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