Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 646 · 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.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
2. 2.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) the same hook (c) time for 10 swings (d) how far we pull it back
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a string (d) turmeric powder
5. 5.⚖️ 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
6. 6.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) it is magnetic (d) the bob could hit you
7. 7.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
8. 8.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 45 seconds?
9. 9.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) quicker (c) slower (d) stopped
10. 10.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) a string (d) a battery cell
11. 11.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 18 seconds?
12. 12.🛟 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
13. 13.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a shorter string (d) a lighter bob
14. 14.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a grandfather clock (d) a phone
15. 15.🧺 Which of these is not needed for the pendulum? (a) a string (b) a magnet (c) a stopwatch (d) a heavy nut or washer
16. 16.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a mirror (d) a stopwatch
17. 17.⚖️ 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
18. 18.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
19. 19.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
20. 20.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it stays the same (c) it halves (d) it becomes 4 times
21. 21.🕰️ 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
22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a mirror (d) a heavy nut or washer
23. 23.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) about the same (d) much faster
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a stopwatch (c) a ruler (d) a pencil and tape
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we change it (c) we measure it
26. 26.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
27. 27.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
28. 28.True or false: a ruler is not needed for the pendulum. (a) False (b) True
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we keep it the same (c) we change it
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) the string length (c) the weight of the bob (d) the same hook
31. 31.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) yeast (c) a ruler (d) a balloon
32. 32.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) the string (c) gravity (d) magnetism
33. 33.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
34. 34.⚖️ 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
35. 35.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
36. 36.⚖️ 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) True (b) False
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a stopwatch (c) a string (d) a pencil and tape
38. 38.⚖️ 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
39. 39.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a battery cell (d) a heavy nut or washer

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