Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 51 · 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.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
2. 2.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) turmeric powder (c) a string (d) a pencil and tape
3. 3.🛟 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
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we measure it (c) we keep it the same
5. 5.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
6. 6.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) much faster (d) it cannot swing
7. 7.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a grandfather clock (d) a phone
8. 8.🧺 Which of these is needed for the pendulum? (a) yeast (b) a mirror (c) a string (d) a battery cell
9. 9.True or false: a magnet is not needed for the pendulum. (a) False (b) True
10. 10.⚖️ 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
11. 11.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a shorter string (c) a heavier bob (d) a longer string
12. 12.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) stopped (c) slower (d) heavier
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) how far we pull it back (c) the string length (d) the same hook
14. 14.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 20 seconds?
15. 15.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
16. 16.⚖️ 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
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we keep it the same (c) we measure it
18. 18.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
19. 19.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
20. 20.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
21. 21.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
22. 22.🧺 Which of these is needed for the pendulum? (a) a mirror (b) yeast (c) a battery cell (d) a ruler
23. 23.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) it stops swinging (c) yes, much slower (d) yes, much faster
24. 24.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a heavy brick (d) a glass bottle
25. 25.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
26. 26.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
27. 27.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
28. 28.⚖️ 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
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) how far we pull it back (c) the string length (d) time for 10 swings
30. 30.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?
31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) turmeric powder (d) a stopwatch
32. 32.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 12 seconds?
33. 33.⚖️ 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
34. 34.⚖️ 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
35. 35.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a heavy nut or washer (c) a balloon (d) a magnet
36. 36.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 51 seconds?
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a string (d) yeast
38. 38.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
40. 40.True or false: a mirror is not needed for the pendulum. (a) False (b) True

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