Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 856 · 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.True or false: a string is not needed for the pendulum. (a) False (b) True
2. 2.⚖️ 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
3. 3.🕰️ 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) 10 is a lucky number (d) it is more accurate
4. 4.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) a heavy nut or washer (d) a balloon
5. 5.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
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.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the same hook (c) time for 10 swings
9. 9.⚖️ 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
10. 10.⚖️ 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) True (b) False
11. 11.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it doubles (c) it halves (d) it becomes 4 times
12. 12.🧺 Which of these is needed for the pendulum? (a) a balloon (b) yeast (c) a heavy nut or washer (d) a mirror
13. 13.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a lighter bob (c) a heavier bob (d) a shorter string
14. 14.⚖️ 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) the weight of the bob (c) the string length
15. 15.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is magnetic (d) it is hot
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a battery cell (d) a heavy nut or washer
17. 17.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
18. 18.⚖️ 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
19. 19.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
20. 20.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 51 seconds?
21. 21.🧺 Which of these is needed for the pendulum? (a) a string (b) a magnet (c) a battery cell (d) a mirror
22. 22.True or false: a ruler is not needed for the pendulum. (a) False (b) True
23. 23.True or false: a mirror is needed for the pendulum. (a) True (b) False
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) False (b) True
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a stopwatch (c) a string (d) a ruler
26. 26.⚖️ 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 string length (c) time for 10 swings (d) how far we pull it back
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) True (b) False
28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a mirror (c) a stopwatch (d) a heavy nut or washer
29. 29.True or false: a string is needed for the pendulum. (a) False (b) True
30. 30.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a small nut or washer (d) a heavy brick
31. 31.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) heavier (d) slower
32. 32.🧺 Which of these is needed for the pendulum? (a) yeast (b) a magnet (c) a stopwatch (d) a battery cell
33. 33.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
34. 34.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
35. 35.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) a magnet (c) turmeric powder (d) a mirror
36. 36.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
37. 37.⚖️ 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
38. 38.True or false: a balloon is needed for the pendulum. (a) False (b) True
39. 39.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
40. 40.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) the string (c) magnetism (d) gravity

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