Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 255 · 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.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 12 seconds?
2. 2.⚖️ 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
3. 3.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a magnet (c) a ruler (d) a pencil and tape
5. 5.🧺 Which of these is not needed for the pendulum? (a) a string (b) a stopwatch (c) a pencil and tape (d) a battery cell
6. 6.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
7. 7.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
8. 8.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a sharp tool (c) a heavy brick (d) a glass bottle
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) the string length (c) the weight of the bob (d) time for 10 swings
10. 10.⚖️ 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
11. 11.True or false: yeast is needed for the pendulum. (a) False (b) True
12. 12.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
13. 13.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
14. 14.⚖️ 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
15. 15.🛟 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
16. 16.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
17. 17.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a ruler (c) a stopwatch (d) a string
18. 18.⚖️ 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) False (b) True
19. 19.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a string (c) a heavy nut or washer (d) a ruler
21. 21.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
22. 22.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it doubles (c) it becomes 4 times (d) it halves
23. 23.⚖️ 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 measure it (c) we change it
24. 24.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
25. 25.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
26. 26.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a mirror (c) a stopwatch (d) a string
27. 27.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) turmeric powder (c) a heavy nut or washer (d) a ruler
29. 29.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a longer string (d) a shorter string
30. 30.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more fun (c) it is more accurate (d) 10 is a lucky number
31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) yeast (d) a stopwatch
32. 32.⚖️ 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
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a balloon (c) a pencil and tape (d) a heavy nut or washer
34. 34.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
35. 35.⚖️ 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
36. 36.⚖️ 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
37. 37.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
38. 38.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) stopped (c) heavier (d) slower
39. 39.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a sundial (d) a phone
40. 40.True or false: a string is needed for the pendulum. (a) True (b) False

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