Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 643 · 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.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
2. 2.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) about the same (d) much slower
3. 3.⚖️ 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
4. 4.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a glass bottle (d) a small nut or washer
5. 5.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
6. 6.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a lighter bob (d) a longer string
7. 7.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) time for 10 swings (c) the string length
9. 9.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) yeast (c) a stopwatch (d) turmeric powder
10. 10.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the string (c) magnetism (d) the wind
11. 11.⚖️ 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 string length (d) the same hook
12. 12.True or false: a string is needed for the pendulum. (a) False (b) True
13. 13.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) False (b) True
15. 15.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) it is wet (d) the bob could hit you
16. 16.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
17. 17.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
18. 18.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
19. 19.⚖️ 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) True (b) False
20. 20.⚖️ 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
21. 21.⚖️ 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
22. 22.🔮 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
23. 23.🧺 Which of these is needed for the pendulum? (a) yeast (b) a magnet (c) a battery cell (d) a heavy nut or washer
24. 24.🧺 Which of these is needed for the pendulum? (a) yeast (b) a magnet (c) a ruler (d) turmeric powder
25. 25.⚖️ 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 measure it (c) we change it
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is the one thing we change. (a) False (b) True
27. 27.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
28. 28.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 38 seconds?
29. 29.⚖️ 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) False (b) True
30. 30.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
31. 31.True or false: yeast is not needed for the pendulum. (a) True (b) False
32. 32.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a stopwatch (c) a magnet (d) a pencil and tape
33. 33.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a digital watch (c) a sundial (d) a grandfather clock
34. 34.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 12 seconds?
35. 35.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
36. 36.True or false: a balloon is needed for the pendulum. (a) True (b) False
37. 37.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
38. 38.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 7 seconds?
39. 39.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more accurate (c) one swing is too slow (d) it is more fun
40. 40.True or false: yeast is needed for the pendulum. (a) False (b) True

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