Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 38 · 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 pencil and tape (b) a stopwatch (c) yeast (d) a ruler
2. 2.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a magnet (d) a string
3. 3.⚖️ 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
4. 4.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
5. 5.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) one swing is too slow (c) 10 is a lucky number (d) it is more fun
6. 6.⚖️ 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) how far we pull it back (d) time for 10 swings
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) time for 10 swings (c) the string length
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a stopwatch (c) a heavy nut or washer (d) a string
9. 9.⚖️ 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
10. 10.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
11. 11.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
12. 12.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) a battery cell (d) a heavy nut or washer
13. 13.True or false: a magnet is needed for the pendulum. (a) False (b) True
14. 14.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a digital watch (c) a grandfather clock (d) a sundial
15. 15.⚖️ 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 measure it (c) we keep it the same
16. 16.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
18. 18.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is magnetic (d) it is wet
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a heavy nut or washer (c) a string (d) a stopwatch
20. 20.⚖️ 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) True (b) False
21. 21.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a string (c) a magnet (d) a mirror
22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a mirror (c) a ruler (d) a pencil and tape
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we change it (c) we measure it
24. 24.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 54 seconds?
25. 25.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
26. 26.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
27. 27.🧺 Which of these is needed for the pendulum? (a) yeast (b) a heavy nut or washer (c) a battery cell (d) a balloon
28. 28.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
29. 29.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a balloon (c) yeast (d) a stopwatch
30. 30.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
31. 31.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 16 seconds?
32. 32.True or false: a ruler is not needed for the pendulum. (a) True (b) False
33. 33.True or false: a ruler is needed for the pendulum. (a) False (b) True
34. 34.⚖️ 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
35. 35.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
36. 36.⚖️ 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 weight of the bob (d) the string length
37. 37.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a small nut or washer (d) a sharp tool
38. 38.🕰️ 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
39. 39.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 32 seconds?
40. 40.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) quicker (c) stopped (d) slower

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