Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 811 · 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.True or false: a balloon is not needed for the pendulum. (a) False (b) True
2. 2.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it doubles (d) it halves
3. 3.🔮 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
4. 4.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a heavy nut or washer (d) turmeric powder
6. 6.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 20 seconds?
7. 7.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a magnet (c) a stopwatch (d) a ruler
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a pencil and tape (d) yeast
9. 9.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a magnet (d) a ruler
11. 11.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
12. 12.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much slower (c) yes, much faster (d) no, hardly at all
13. 13.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) the bob could hit you (d) it is hot
14. 14.⚖️ 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
15. 15.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
16. 16.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) gravity (c) magnetism (d) the string
17. 17.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
18. 18.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a magnet (c) a mirror (d) turmeric powder
19. 19.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a phone (d) a grandfather clock
20. 20.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a mirror (c) a ruler (d) a pencil and tape
21. 21.⚖️ 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
22. 22.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) quicker (d) stopped
23. 23.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 18 seconds?
24. 24.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a small nut or washer (d) a heavy brick
25. 25.⚖️ 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
26. 26.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
27. 27.⚖️ 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) True (b) False
28. 28.⚖️ 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
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) how far we pull it back (b) the string length (c) the same hook (d) the weight of the bob
30. 30.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
31. 31.⚖️ 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
32. 32.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
33. 33.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
34. 34.⚖️ 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
35. 35.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
36. 36.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
37. 37.⚖️ 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 same hook (c) the weight of the bob (d) the string length
38. 38.True or false: a ruler is not needed for the pendulum. (a) True (b) False
39. 39.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
40. 40.True or false: a string is needed for the pendulum. (a) False (b) True

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