Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 133 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a heavy nut or washer (d) a battery cell
2. 2.⚖️ 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) the same hook (c) time for 10 swings (d) the string length
3. 3.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) the bob could hit you (d) it is wet
4. 4.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it becomes 4 times (d) it stays the same
5. 5.🧺 Which of these is needed for the pendulum? (a) a mirror (b) yeast (c) a ruler (d) a balloon
6. 6.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) it stops swinging (c) no, hardly at all (d) yes, much slower
7. 7.True or false: a ruler is not needed for the pendulum. (a) False (b) True
8. 8.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
9. 9.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a magnet (c) a pencil and tape (d) a stopwatch
11. 11.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a shorter string (c) a heavier bob (d) a longer string
12. 12.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
13. 13.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a phone (c) a digital watch (d) a sundial
14. 14.⚖️ 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
15. 15.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
16. 16.⚖️ 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
17. 17.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
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) True (b) False
19. 19.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a heavy brick (d) a small nut or washer
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a ruler (c) a stopwatch (d) a pencil and tape
21. 21.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
22. 22.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
23. 23.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
24. 24.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
25. 25.⚖️ 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
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a string (c) a pencil and tape (d) a stopwatch
27. 27.True or false: a magnet is not needed for the pendulum. (a) True (b) False
28. 28.⚖️ 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 change it (c) we keep it the same
29. 29.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a string (c) a heavy nut or washer (d) a ruler
30. 30.⚖️ 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 measure it (c) we keep it the same
31. 31.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
32. 32.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
33. 33.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a battery cell (c) a ruler (d) a pencil and tape
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) True (b) False
35. 35.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) the string (c) magnetism (d) gravity
36. 36.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) 10 is a lucky number (c) it is more accurate (d) it is more fun
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is the one thing we change. (a) False (b) True
38. 38.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) quicker (c) slower (d) stopped
39. 39.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a ruler (d) a balloon

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