Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 490 · 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.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) 10 is a lucky number (c) it is more accurate (d) one swing is too slow
2. 2.⚖️ 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
3. 3.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a sundial (d) a digital watch
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) yeast (d) a heavy nut or washer
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.⚖️ 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
7. 7.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) stopped (d) heavier
8. 8.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a longer string (d) a shorter string
9. 9.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it halves (d) it doubles
10. 10.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a string (c) a balloon (d) yeast
11. 11.⚖️ 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 measure it (c) we keep it the same
12. 12.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
13. 13.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) the wind (c) gravity (d) magnetism
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
15. 15.True or false: a balloon is not needed for the pendulum. (a) True (b) False
16. 16.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
17. 17.True or false: yeast is needed for the pendulum. (a) False (b) True
18. 18.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
19. 19.⚖️ 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 measure it (b) we keep it the same (c) we change it
20. 20.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) the bob could hit you (d) it is hot
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a pencil and tape (c) a heavy nut or washer (d) a stopwatch
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) how far we pull it back (c) time for 10 swings (d) the same hook
23. 23.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
24. 24.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a balloon (c) a pencil and tape (d) a battery cell
25. 25.True or false: a ruler is needed for the pendulum. (a) True (b) False
26. 26.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a string (c) a heavy nut or washer (d) a pencil and tape
28. 28.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a stopwatch (c) a heavy nut or washer (d) a string
29. 29.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
30. 30.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a magnet (c) a stopwatch (d) a balloon
31. 31.⚖️ 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 same hook (c) the weight of the bob (d) how far we pull it back
32. 32.True or false: a string is not needed for the pendulum. (a) False (b) True
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a balloon (d) a string
34. 34.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
35. 35.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 16 seconds?
36. 36.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
37. 37.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 14 seconds?
38. 38.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
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 measure it (b) we change it (c) we keep it the same
40. 40.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False

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