Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 537 · 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.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it stays the same (d) it doubles
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) the weight of the bob (c) time for 10 swings (d) how far we pull it back
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) turmeric powder (d) a stopwatch
4. 4.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
5. 5.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
6. 6.True or false: a string is not needed for the pendulum. (a) True (b) False
7. 7.⚖️ 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 change it (b) we keep it the same (c) we measure it
8. 8.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) a ruler (d) turmeric powder
9. 9.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
10. 10.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a heavy brick (d) a small nut or washer
11. 11.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) the bob could hit you (d) it is wet
12. 12.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a battery cell (d) a heavy nut or washer
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we measure it (c) we keep it the same
15. 15.True or false: a string is needed for the pendulum. (a) True (b) False
16. 16.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
17. 17.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) it is more accurate (c) one swing is too slow (d) 10 is a lucky number
18. 18.⚖️ 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
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a pencil and tape (c) a stopwatch (d) a heavy nut or washer
20. 20.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 51 seconds?
21. 21.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
22. 22.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a shorter string (d) a lighter bob
23. 23.⚖️ 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
24. 24.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
25. 25.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
26. 26.⚖️ 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
27. 27.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) quicker (d) slower
28. 28.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 20 seconds?
29. 29.True or false: a battery cell is needed for the pendulum. (a) False (b) True
30. 30.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) a stopwatch (d) turmeric powder
31. 31.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
32. 32.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 18 seconds?
33. 33.🧺 Which of these is needed for the pendulum? (a) yeast (b) a pencil and tape (c) a mirror (d) a balloon
34. 34.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the wind (c) the string (d) gravity
35. 35.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) yes, much faster (c) no, hardly at all (d) it stops swinging
36. 36.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a string (c) a magnet (d) a battery cell
37. 37.⚖️ 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 keep it the same (c) we measure it
38. 38.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 38 seconds?
39. 39.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 10 seconds?
40. 40.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a grandfather clock (d) a phone

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