Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 432 · 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.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 39 seconds?
2. 2.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 10 seconds?
3. 3.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) quicker (d) stopped
4. 4.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it stays the same (d) it doubles
5. 5.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a heavy nut or washer (c) turmeric powder (d) a balloon
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we keep it the same (c) we change it
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
8. 8.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a battery cell (c) a ruler (d) a stopwatch
9. 9.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
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 keep it the same (b) we measure it (c) we change it
11. 11.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
12. 12.True or false: a ruler is not needed for the pendulum. (a) True (b) False
13. 13.⚖️ 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 string length (c) how far we pull it back (d) the weight of the bob
14. 14.🧺 Which of these is not needed for the pendulum? (a) a string (b) a pencil and tape (c) a stopwatch (d) yeast
15. 15.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a ruler (c) a balloon (d) a battery cell
16. 16.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
17. 17.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
18. 18.⚖️ 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
19. 19.🧺 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 ruler
20. 20.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
21. 21.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
22. 22.True or false: a balloon is needed for the pendulum. (a) True (b) False
23. 23.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a string (c) a magnet (d) a mirror
24. 24.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) 10 is a lucky number (c) it is more fun (d) one swing is too slow
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a mirror (d) a string
26. 26.🛟 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
27. 27.⚖️ 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
28. 28.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) the string (c) magnetism (d) gravity
29. 29.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 7 seconds?
30. 30.True or false: a mirror is not needed for the pendulum. (a) False (b) True
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is the one thing we change. (a) True (b) False
32. 32.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
33. 33.⚖️ 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
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we measure it (c) we change it
35. 35.⚖️ 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) the same hook (c) how far we pull it back (d) the string length
36. 36.True or false: a ruler is needed for the pendulum. (a) False (b) True
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a balloon (d) a stopwatch
38. 38.⚖️ 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
39. 39.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a lighter bob (c) a heavier bob (d) a shorter string
40. 40.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) yes, much faster (c) it stops swinging (d) no, hardly at all

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