Simple Pendulum Experiment Worksheet

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

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