Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 13 · 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 pencil and tape (b) a string (c) a ruler (d) turmeric powder
2. 2.⚖️ 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
3. 3.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) it is hot (d) the bob could hit you
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) the string length (c) the weight of the bob (d) the same hook
5. 5.⚖️ 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
6. 6.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) 10 is a lucky number (c) it is more fun (d) one swing is too slow
7. 7.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 20 seconds?
8. 8.⚖️ 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
9. 9.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
10. 10.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the wind (c) gravity (d) the string
11. 11.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a magnet (c) a heavy nut or washer (d) turmeric powder
12. 12.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
13. 13.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a pencil and tape (c) a battery cell (d) turmeric powder
14. 14.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
15. 15.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a phone (c) a digital watch (d) a sundial
16. 16.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 30 seconds?
17. 17.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
18. 18.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it halves (d) it doubles
19. 19.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
20. 20.🔮 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
21. 21.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a glass bottle (d) a small nut or washer
22. 22.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a shorter string (d) a longer string
23. 23.⚖️ 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 keep it the same (c) we measure it
24. 24.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) it stops swinging (c) yes, much slower (d) no, hardly at all
25. 25.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a balloon (c) a string (d) a ruler
26. 26.⚖️ 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
27. 27.⚖️ 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
28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a magnet (d) a stopwatch
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a balloon (d) a stopwatch
30. 30.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
31. 31.True or false: yeast is needed for the pendulum. (a) True (b) False
32. 32.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
33. 33.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a balloon (c) a string (d) a mirror
34. 34.⚖️ 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) True (b) False
35. 35.⚖️ 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 weight of the bob (c) the string length (d) how far we pull it back
36. 36.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a pencil and tape (c) a stopwatch (d) a ruler
37. 37.⚖️ 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
38. 38.True or false: a balloon is 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: how far we pull it back is kept the same. (a) False (b) True
40. 40.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed

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