Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 150 · 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.🔮 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 doubles (d) it halves
2. 2.True or false: a string is needed for the pendulum. (a) False (b) True
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is kept the same. (a) False (b) True
4. 4.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) heavier (d) slower
5. 5.⚖️ 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
6. 6.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a magnet (c) yeast (d) a string
7. 7.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a sharp tool (d) a heavy brick
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we measure it (c) we keep it the same
9. 9.⚖️ 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 keep it the same (c) we measure it
10. 10.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
11. 11.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a longer string (d) a lighter bob
12. 12.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) much faster (d) it cannot swing
13. 13.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) it is wet (d) the bob could hit you
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) False (b) True
15. 15.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
16. 16.🧺 Which of these is needed for the pendulum? (a) a balloon (b) turmeric powder (c) a pencil and tape (d) a mirror
17. 17.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
18. 18.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
19. 19.True or false: a battery cell is needed for the pendulum. (a) False (b) True
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a pencil and tape (c) a string (d) a stopwatch
21. 21.True or false: a magnet is not needed for the pendulum. (a) False (b) True
22. 22.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the same hook (b) the string length (c) time for 10 swings (d) how far we pull it back
24. 24.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much faster (c) yes, much slower (d) it stops swinging
25. 25.True or false: a balloon is needed for the pendulum. (a) True (b) False
26. 26.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) one swing is too slow (c) it is more accurate (d) 10 is a lucky number
27. 27.⚖️ 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
28. 28.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 45 seconds?
29. 29.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) gravity (d) the wind
30. 30.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
31. 31.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 51 seconds?
32. 32.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 28 seconds?
33. 33.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a stopwatch (c) a magnet (d) a balloon
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) False (b) True
35. 35.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) a heavy nut or washer (d) turmeric powder
36. 36.⚖️ 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 change it (c) we measure it
37. 37.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a ruler (c) a heavy nut or washer (d) a string
38. 38.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a string (c) a stopwatch (d) a pencil and tape
39. 39.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
40. 40.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed

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