Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 167 · 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 becomes 4 times (b) it halves (c) it stays the same (d) it doubles
2. 2.⚖️ 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
3. 3.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a sharp tool (d) a small nut or washer
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the same hook (b) the string length (c) how far we pull it back (d) time for 10 swings
5. 5.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
6. 6.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 7 seconds?
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) the weight of the bob (c) how far we pull it back (d) time for 10 swings
8. 8.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
9. 9.🛟 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
10. 10.⚖️ 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 measure it (c) we change it
11. 11.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a pencil and tape (d) turmeric powder
13. 13.True or false: yeast is not needed for the pendulum. (a) False (b) True
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a pencil and tape (c) a stopwatch (d) a string
15. 15.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we change it (c) we measure it
17. 17.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 45 seconds?
18. 18.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 17 seconds?
19. 19.🧺 Which of these is needed for the pendulum? (a) yeast (b) turmeric powder (c) a heavy nut or washer (d) a mirror
20. 20.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 13 seconds?
21. 21.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a longer string (d) a shorter string
22. 22.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a phone (c) a digital watch (d) a sundial
23. 23.⚖️ 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
24. 24.⚖️ 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
25. 25.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
26. 26.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) how far we pull it back (c) time for 10 swings
29. 29.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
30. 30.⚖️ 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 string length (c) the weight of the bob
31. 31.🔮 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
32. 32.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a ruler (c) a string (d) a pencil and tape
33. 33.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
34. 34.True or false: a magnet is needed for the pendulum. (a) True (b) False
35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we change it (c) we measure it
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a battery cell (c) a string (d) a pencil and tape
37. 37.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a stopwatch (c) yeast (d) a heavy nut or washer
38. 38.True or false: a ruler is needed for the pendulum. (a) True (b) False
39. 39.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) gravity (c) the wind (d) magnetism
40. 40.⚖️ 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

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