Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 177 · 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 mirror (b) a ruler (c) a stopwatch (d) a string
2. 2.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
3. 3.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
4. 4.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 6 seconds?
5. 5.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
6. 6.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a longer string (d) a shorter string
7. 7.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
8. 8.🛟 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
9. 9.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) yeast (c) a heavy nut or washer (d) a ruler
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a mirror (c) a heavy nut or washer (d) a string
11. 11.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) quicker (d) slower
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a stopwatch (c) a ruler (d) a pencil and tape
13. 13.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) turmeric powder (d) a ruler
16. 16.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
17. 17.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is wet (d) it is magnetic
18. 18.⚖️ 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
19. 19.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
20. 20.True or false: a battery cell is needed for the pendulum. (a) True (b) False
21. 21.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the string (c) magnetism (d) the wind
22. 22.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
23. 23.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) a magnet (d) a ruler
25. 25.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) yeast (c) turmeric powder (d) a stopwatch
26. 26.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it doubles (c) it stays the same (d) it becomes 4 times
27. 27.⚖️ 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 weight of the bob (c) the string length (d) the same hook
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) the weight of the bob (c) time for 10 swings (d) how far we pull it back
29. 29.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much faster (c) it stops swinging (d) yes, much slower
30. 30.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 11 seconds?
31. 31.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
32. 32.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a battery cell (c) a string (d) a pencil and tape
33. 33.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
34. 34.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
35. 35.⚖️ 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
36. 36.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) a stopwatch (d) yeast
38. 38.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a heavy nut or washer (c) a mirror (d) turmeric powder
39. 39.⚖️ 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 weight of the bob
40. 40.⚖️ 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

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