Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 381 · 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.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a longer string (c) a shorter string (d) a heavier bob
2. 2.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a sundial (c) a phone (d) a digital watch
3. 3.True or false: a string is needed for the pendulum. (a) True (b) False
4. 4.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
5. 5.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a heavy brick (c) a glass bottle (d) a sharp tool
6. 6.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) it stops swinging (c) yes, much slower (d) no, hardly at all
7. 7.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much slower (c) it cannot swing (d) much faster
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a stopwatch (d) a magnet
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) False (b) True
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a pencil and tape (c) a ruler (d) a mirror
11. 11.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) it is more fun (c) one swing is too slow (d) 10 is a lucky number
12. 12.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
13. 13.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
14. 14.True or false: a balloon is not needed for the pendulum. (a) False (b) True
15. 15.🧺 Which of these is not needed for the pendulum? (a) a string (b) a pencil and tape (c) a ruler (d) yeast
16. 16.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) a balloon (d) a stopwatch
17. 17.⚖️ 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 change it (b) we measure it (c) we keep it the same
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) the string length (c) time for 10 swings
20. 20.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 8 seconds?
21. 21.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) turmeric powder (d) a string
22. 22.True or false: yeast is needed for the pendulum. (a) False (b) True
23. 23.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the wind (c) the string (d) magnetism
24. 24.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
25. 25.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is magnetic (c) it is wet (d) it is hot
26. 26.⚖️ 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
27. 27.True or false: a magnet is not needed for the pendulum. (a) True (b) False
28. 28.⚖️ 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
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we keep it the same (c) we change it
30. 30.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) stopped (d) quicker
31. 31.True or false: yeast is not needed for the pendulum. (a) False (b) True
32. 32.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) a balloon (d) a pencil and tape
34. 34.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
35. 35.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
36. 36.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
37. 37.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
38. 38.⚖️ 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) the weight of the bob (c) how far we pull it back (d) the same hook
39. 39.⚖️ 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
40. 40.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a mirror (c) a magnet (d) a balloon

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids