Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 174 · 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.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) it is wet (d) the bob could hit you
2. 2.True or false: yeast is not needed for the pendulum. (a) False (b) True
3. 3.True or false: a mirror is not needed for the pendulum. (a) True (b) False
4. 4.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
5. 5.⚖️ 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 keep it the same (c) we measure it
6. 6.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it stays the same (c) it becomes 4 times (d) it doubles
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) the string length (c) time for 10 swings
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a battery cell (d) a stopwatch
9. 9.⚖️ 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 change it (c) we keep it the same
10. 10.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 13 seconds?
11. 11.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) it cannot swing (c) much slower (d) about the same
12. 12.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
13. 13.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
14. 14.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a heavy brick (d) a sharp tool
15. 15.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) it stops swinging (c) no, hardly at all (d) yes, much slower
16. 16.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
17. 17.⚖️ 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
18. 18.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?
19. 19.🧺 Which of these is needed for the pendulum? (a) yeast (b) a ruler (c) turmeric powder (d) a battery cell
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) how far we pull it back (c) time for 10 swings (d) the string length
21. 21.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) heavier (d) stopped
22. 22.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the wind (c) the string (d) gravity
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a string (c) a heavy nut or washer (d) a stopwatch
24. 24.⚖️ 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
25. 25.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) one swing is too slow (c) 10 is a lucky number (d) it is more accurate
26. 26.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
27. 27.⚖️ 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 same hook (c) the string length (d) how far we pull it back
28. 28.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 24 seconds?
29. 29.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
30. 30.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
31. 31.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a string (c) a stopwatch (d) a pencil and tape
32. 32.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
33. 33.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a shorter string (c) a heavier bob (d) a lighter bob
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we measure it (c) we change it
35. 35.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) turmeric powder (d) a string
36. 36.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 10 seconds?
37. 37.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a phone (d) a grandfather clock
38. 38.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
39. 39.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 16 seconds?
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a pencil and tape (d) a mirror

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