Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 872 · 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 not needed for the pendulum? (a) a string (b) a ruler (c) turmeric powder (d) a stopwatch
2. 2.⚖️ 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
3. 3.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
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.⚖️ 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
6. 6.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
7. 7.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a balloon (c) yeast (d) a heavy nut or washer
8. 8.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a string (d) a magnet
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) the string length (c) the weight of the bob (d) how far we pull it back
11. 11.⚖️ 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
12. 12.🔮 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
13. 13.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is magnetic (d) it is wet
14. 14.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) quicker (d) heavier
15. 15.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
16. 16.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a pencil and tape (d) a mirror
17. 17.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) no, hardly at all (c) it stops swinging (d) yes, much faster
18. 18.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
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.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 38 seconds?
21. 21.🛟 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
22. 22.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a ruler (c) a pencil and tape (d) a string
23. 23.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it doubles (c) it stays the same (d) it halves
24. 24.⚖️ 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) the string length (c) how far we pull it back (d) the same hook
25. 25.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 15 seconds?
26. 26.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
27. 27.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) 10 is a lucky number (c) it is more fun (d) it is more accurate
28. 28.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
29. 29.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 57 seconds?
30. 30.⚖️ 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) True (b) False
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we change it (c) we keep it the same
32. 32.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
33. 33.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
34. 34.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 19 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 keep it the same (b) we change it (c) we measure it
36. 36.True or false: a mirror is needed for the pendulum. (a) True (b) False
37. 37.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
38. 38.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
39. 39.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
40. 40.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a grandfather clock (d) a phone

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