Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 720 · 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.🕰️ 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
2. 2.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) heavier (d) stopped
3. 3.True or false: a balloon is needed for the pendulum. (a) False (b) True
4. 4.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
5. 5.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a sundial (d) a digital watch
6. 6.🔮 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
7. 7.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
8. 8.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
9. 9.⚖️ 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
10. 10.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 18 seconds?
11. 11.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a glass bottle (d) a heavy brick
12. 12.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
13. 13.⚖️ 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 change it (c) we measure it
14. 14.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a longer string (d) a lighter bob
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) the string length (c) the weight of the bob (d) how far we pull it back
16. 16.🧺 Which of these is needed for the pendulum? (a) yeast (b) a battery cell (c) a balloon (d) a stopwatch
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) yeast (c) a pencil and tape (d) a ruler
18. 18.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a magnet (c) a string (d) a mirror
19. 19.⚖️ 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 same hook (c) the string length
20. 20.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
21. 21.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
22. 22.⚖️ 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 weight of the bob (d) the string length
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) True (b) False
24. 24.True or false: a battery cell is needed for the pendulum. (a) False (b) True
25. 25.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a pencil and tape (c) a string (d) a magnet
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we keep it the same (c) we change it
28. 28.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a mirror (d) a heavy nut or washer
29. 29.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) about the same (d) much faster
30. 30.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) magnetism (c) the string (d) the wind
31. 31.True or false: a magnet is needed for the pendulum. (a) False (b) True
32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is kept the same. (a) False (b) True
33. 33.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
34. 34.⚖️ 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
35. 35.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a pencil and tape (c) a string (d) a battery cell
36. 36.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
37. 37.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 45 seconds?
38. 38.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is hot (c) it is magnetic (d) the bob could hit you
39. 39.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
40. 40.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False

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