Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 301 · 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) one swing is too slow (b) it is more fun (c) it is more accurate (d) 10 is a lucky number
2. 2.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a string (c) turmeric powder (d) yeast
3. 3.⚖️ 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 keep it the same (c) we measure it
4. 4.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
5. 5.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a mirror (c) a pencil and tape (d) a string
6. 6.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) the string length (c) time for 10 swings
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) the weight of the bob (c) time for 10 swings (d) the string length
9. 9.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) slower (d) heavier
10. 10.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 34 seconds?
11. 11.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
12. 12.🛟 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
13. 13.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a balloon (c) a magnet (d) a battery cell
14. 14.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
15. 15.⚖️ 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
16. 16.True or false: a magnet is needed for the pendulum. (a) False (b) True
17. 17.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a magnet (c) a ruler (d) a mirror
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we measure it (c) we keep it the same
19. 19.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 10 seconds?
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) a magnet (d) a string
21. 21.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) yeast (c) a magnet (d) a heavy nut or washer
22. 22.True or false: a string is needed for the pendulum. (a) False (b) True
23. 23.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a phone (c) a grandfather clock (d) a digital watch
24. 24.⚖️ 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
25. 25.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a heavy nut or washer (d) a balloon
26. 26.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it doubles (d) it becomes 4 times
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.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a heavier bob (d) a lighter bob
29. 29.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
30. 30.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 57 seconds?
31. 31.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
32. 32.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
33. 33.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 10 seconds?
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) how far we pull it back (b) the same hook (c) the weight of the bob (d) the string length
35. 35.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
36. 36.True or false: a string is not needed for the pendulum. (a) False (b) True
37. 37.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
38. 38.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a small nut or washer (d) a sharp tool
39. 39.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
40. 40.⚖️ 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) True (b) False

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