Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 841 · 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 battery cell for the pendulum? (a) needed (b) not needed
2. 2.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a digital watch (d) a sundial
3. 3.⚖️ 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
4. 4.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
5. 5.⚖️ 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
6. 6.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a small nut or washer (c) a glass bottle (d) a sharp tool
7. 7.True or false: yeast is needed for the pendulum. (a) False (b) True
8. 8.⚖️ 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) time for 10 swings (c) the string length (d) the same hook
9. 9.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
10. 10.⚖️ 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
11. 11.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is hot (d) it is magnetic
12. 12.🧺 Which of these is needed for the pendulum? (a) yeast (b) a magnet (c) a pencil and tape (d) a balloon
13. 13.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) heavier (c) stopped (d) slower
14. 14.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) about the same (d) much slower
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) turmeric powder (c) a stopwatch (d) a string
16. 16.🔮 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 becomes 4 times (d) it halves
17. 17.⚖️ 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
18. 18.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) the wind (d) gravity
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 stopwatch (d) a ruler
20. 20.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
21. 21.True or false: a string is needed for the pendulum. (a) False (b) True
22. 22.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
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? Which of these is what we measure? (a) the weight of the bob (b) the string length (c) time for 10 swings (d) how far we pull it back
25. 25.True or false: a balloon is not needed for the pendulum. (a) False (b) True
26. 26.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a battery cell (c) a balloon (d) a heavy nut or washer
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a balloon (d) a heavy nut or washer
28. 28.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
29. 29.⚖️ 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
30. 30.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
31. 31.🧺 Which of these is needed for the pendulum? (a) a string (b) a battery cell (c) a mirror (d) a magnet
32. 32.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more accurate (c) it is more fun (d) 10 is a lucky number
33. 33.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
34. 34.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a lighter bob (d) a longer string
35. 35.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
36. 36.⚖️ 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 measure it (c) we change it
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) True (b) False
38. 38.⚖️ 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
39. 39.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
40. 40.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed

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