Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 514 · 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 string is not needed for the pendulum. (a) False (b) True
2. 2.⚖️ 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
3. 3.⚖️ 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 same hook (c) time for 10 swings (d) the string length
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we keep it the same (c) we change it
5. 5.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
6. 6.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a sundial (c) a phone (d) a digital watch
7. 7.⚖️ 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
8. 8.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it doubles (d) it becomes 4 times
9. 9.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) no, hardly at all (c) yes, much slower (d) it stops swinging
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) False (b) True
11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a pencil and tape (c) yeast (d) a ruler
12. 12.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
13. 13.True or false: a mirror is not needed for the pendulum. (a) True (b) False
14. 14.🧺 Which of these is needed for the pendulum? (a) a magnet (b) turmeric powder (c) a balloon (d) a heavy nut or washer
15. 15.⚖️ 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
16. 16.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) stopped (d) heavier
17. 17.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
18. 18.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 28 seconds?
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a pencil and tape (c) a string (d) a heavy nut or washer
20. 20.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a small nut or washer (d) a glass bottle
21. 21.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
22. 22.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we keep it the same (c) we change it
25. 25.True or false: a magnet is not needed for the pendulum. (a) False (b) True
26. 26.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
27. 27.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
28. 28.True or false: a balloon is needed for the pendulum. (a) False (b) True
29. 29.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) the string length (c) how far we pull it back (d) time for 10 swings
31. 31.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
32. 32.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a battery cell (c) a pencil and tape (d) a heavy nut or washer
33. 33.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is wet (c) it is magnetic (d) it is hot
34. 34.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) False (b) True
36. 36.🧺 Which of these is needed for the pendulum? (a) yeast (b) a battery cell (c) a stopwatch (d) a magnet
37. 37.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a heavier bob (c) a shorter string (d) a lighter bob
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a heavy nut or washer (c) a string (d) a stopwatch
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a pencil and tape (c) a balloon (d) a ruler
40. 40.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 20 seconds?

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