Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 156 · 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.⚖️ 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
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) time for 10 swings (c) the same hook (d) the weight of the bob
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a battery cell (c) a string (d) a stopwatch
4. 4.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) heavier (d) quicker
5. 5.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) True (b) False
7. 7.True or false: yeast is needed for the pendulum. (a) False (b) True
8. 8.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
9. 9.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) magnetism (c) gravity (d) the string
10. 10.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a small nut or washer (d) a heavy brick
11. 11.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a sundial (d) a phone
12. 12.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a stopwatch (c) a ruler (d) turmeric powder
13. 13.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) yes, much faster (c) it stops swinging (d) no, hardly at all
14. 14.True or false: a magnet is needed for the pendulum. (a) True (b) False
15. 15.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
16. 16.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it becomes 4 times (d) it stays the same
17. 17.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 18 seconds?
18. 18.⚖️ 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
19. 19.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is magnetic (c) it is wet (d) it is hot
20. 20.⚖️ 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
21. 21.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
22. 22.True or false: a magnet is not needed for the pendulum. (a) False (b) True
23. 23.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a magnet (c) a pencil and tape (d) a string
25. 25.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 24 seconds?
26. 26.🧺 Which of these is not needed for the pendulum? (a) a string (b) a heavy nut or washer (c) a ruler (d) a battery cell
27. 27.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) one swing is too slow (c) it is more accurate (d) it is more fun
28. 28.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
29. 29.⚖️ 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
30. 30.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
31. 31.True or false: a mirror is needed for the pendulum. (a) False (b) True
32. 32.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 19 seconds?
33. 33.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a balloon (c) a magnet (d) a stopwatch
34. 34.⚖️ 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 keep it the same (b) we change it (c) we measure it
35. 35.⚖️ 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
36. 36.True or false: a balloon is not needed for the pendulum. (a) False (b) True
37. 37.True or false: a string is not needed for the pendulum. (a) False (b) True
38. 38.⚖️ 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
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) how far we pull it back
40. 40.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 10 seconds?

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