Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 939 · 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 old clock uses a pendulum to keep time? (a) a sundial (b) a phone (c) a grandfather clock (d) a digital watch
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.⚖️ 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
4. 4.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) it cannot swing (c) about the same (d) much faster
5. 5.True or false: a string is not needed for the pendulum. (a) False (b) True
6. 6.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) the bob could hit you (d) it is wet
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) the string length (c) time for 10 swings (d) how far we pull it back
8. 8.🛟 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
9. 9.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) turmeric powder (c) a string (d) a mirror
10. 10.⚖️ 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
11. 11.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) gravity (c) magnetism (d) the wind
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a stopwatch (d) a battery cell
13. 13.🕰️ 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) 10 is a lucky number (d) it is more fun
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a magnet (c) a pencil and tape (d) a stopwatch
15. 15.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
16. 16.⚖️ 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
17. 17.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) yeast (c) a stopwatch (d) a heavy nut or washer
18. 18.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a balloon (d) a heavy nut or washer
20. 20.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) how far we pull it back (c) the string length
22. 22.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 32 seconds?
23. 23.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 30 seconds?
24. 24.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a magnet (c) turmeric powder (d) a heavy nut or washer
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) the string length (c) time for 10 swings
26. 26.True or false: a string is needed for the pendulum. (a) True (b) False
27. 27.🧺 Which of these is needed for the pendulum? (a) yeast (b) a pencil and tape (c) a magnet (d) a mirror
28. 28.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
29. 29.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
30. 30.True or false: yeast is needed for the pendulum. (a) False (b) True
31. 31.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
32. 32.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) heavier (c) stopped (d) slower
33. 33.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a longer string (c) a heavier bob (d) a shorter string
34. 34.⚖️ 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
35. 35.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
36. 36.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
37. 37.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a ruler (c) yeast (d) a battery cell
38. 38.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
39. 39.⚖️ 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
40. 40.True or false: a ruler is needed for the pendulum. (a) True (b) False

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