Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 971 · 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.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we keep it the same (c) we measure it
3. 3.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
4. 4.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
5. 5.🕰️ 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
6. 6.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a longer string (d) a heavier bob
7. 7.🧺 Which of these is needed for the pendulum? (a) a magnet (b) yeast (c) a heavy nut or washer (d) a balloon
8. 8.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
9. 9.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a pencil and tape (d) a mirror
10. 10.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much slower (c) much faster (d) it cannot swing
11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a pencil and tape (d) turmeric powder
12. 12.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) heavier (d) stopped
13. 13.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
14. 14.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
15. 15.⚖️ 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
16. 16.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a heavy brick (c) a sharp tool (d) a glass bottle
17. 17.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
18. 18.🧺 Which of these is needed for the pendulum? (a) a balloon (b) yeast (c) turmeric powder (d) a pencil and tape
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the weight of the bob (c) time for 10 swings
20. 20.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
21. 21.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a phone (c) a digital watch (d) a grandfather clock
22. 22.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a pencil and tape (c) a string (d) a ruler
23. 23.True or false: yeast is needed for the pendulum. (a) False (b) True
24. 24.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
25. 25.⚖️ 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) time for 10 swings
26. 26.⚖️ 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) True (b) False
27. 27.⚖️ 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
28. 28.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
29. 29.True or false: a ruler is not needed for the pendulum. (a) True (b) False
30. 30.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a battery cell (c) a stopwatch (d) turmeric powder
31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a stopwatch (d) yeast
32. 32.⚖️ 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
33. 33.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
34. 34.🧺 Which of these is needed for the pendulum? (a) yeast (b) a string (c) a battery cell (d) a mirror
35. 35.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 28 seconds?
36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) time for 10 swings (c) the same hook (d) the weight of the bob
37. 37.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 11 seconds?
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a battery cell (c) a pencil and tape (d) a stopwatch
39. 39.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a balloon (d) a ruler

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