Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 19 · 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 needed for the pendulum? (a) a mirror (b) a magnet (c) a balloon (d) a pencil and tape
2. 2.True or false: a magnet is not needed for the pendulum. (a) False (b) True
3. 3.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a balloon (c) a heavy nut or washer (d) yeast
4. 4.⚖️ 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) the string length (c) the same hook
5. 5.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
6. 6.True or false: a ruler is needed for the pendulum. (a) False (b) True
7. 7.🧺 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) yeast (d) a stopwatch
8. 8.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 13 seconds?
9. 9.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a sharp tool (d) a small nut or washer
10. 10.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
11. 11.🧺 Which of these is needed for the pendulum? (a) yeast (b) a string (c) a battery cell (d) a magnet
12. 12.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is magnetic (d) it is wet
13. 13.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
14. 14.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 42 seconds?
15. 15.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
16. 16.🧺 Which of these is not needed for the pendulum? (a) a string (b) a pencil and tape (c) a stopwatch (d) a battery cell
17. 17.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 54 seconds?
18. 18.⚖️ 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
19. 19.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) magnetism (c) gravity (d) the string
20. 20.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
21. 21.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a ruler (c) a stopwatch (d) a pencil and tape
22. 22.🧺 Do we need a heavy nut or washer 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: time for 10 swings is what we measure. (a) True (b) False
24. 24.⚖️ 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
25. 25.⚖️ 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
26. 26.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) the weight of the bob (c) how far we pull it back (d) time for 10 swings
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True
29. 29.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) it stops swinging (c) yes, much slower (d) yes, much faster
30. 30.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a phone (d) a grandfather clock
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we keep it the same (c) we change it
32. 32.🧺 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) a battery cell
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we measure it (c) we change it
34. 34.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a magnet (c) a pencil and tape (d) a string
36. 36.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more fun (c) 10 is a lucky number (d) it is more accurate
37. 37.⚖️ 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 keep it the same (c) we change it
38. 38.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
39. 39.True or false: a balloon is needed for the pendulum. (a) False (b) True
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) how far we pull it back (c) time for 10 swings (d) the string length

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