Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 994 · 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 change makes a pendulum swing more slowly? (a) a lighter bob (b) a shorter string (c) a heavier bob (d) a longer string
2. 2.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a small nut or washer (d) a heavy brick
3. 3.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
4. 4.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) it is wet (d) the bob could hit you
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a battery cell (d) a string
6. 6.True or false: a mirror is not needed for the pendulum. (a) True (b) False
7. 7.⚖️ 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) how far we pull it back (c) time for 10 swings (d) the weight of the bob
8. 8.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) quicker (c) stopped (d) slower
9. 9.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it doubles (c) it stays the same (d) it halves
10. 10.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a heavy nut or washer (c) a mirror (d) turmeric powder
11. 11.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
12. 12.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a magnet (d) a stopwatch
14. 14.⚖️ 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
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
16. 16.True or false: a magnet is needed for the pendulum. (a) True (b) False
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we change it (c) we measure it
18. 18.🧺 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 mirror
19. 19.True or false: yeast is needed for the pendulum. (a) True (b) False
20. 20.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
21. 21.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a string (c) a balloon (d) a mirror
22. 22.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a phone (c) a sundial (d) a digital watch
23. 23.True or false: yeast is not needed for the pendulum. (a) True (b) False
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) time for 10 swings (c) the string length (d) how far we pull it back
25. 25.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) no, hardly at all (c) yes, much faster (d) yes, much slower
26. 26.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
27. 27.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) it cannot swing (c) much faster (d) about the same
28. 28.⚖️ 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) True (b) False
29. 29.⚖️ 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 measure it (c) we keep it the same
30. 30.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) the wind (d) gravity
31. 31.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more accurate (c) one swing is too slow (d) it is more fun
32. 32.True or false: a ruler is not needed for the pendulum. (a) True (b) False
33. 33.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
35. 35.⚖️ 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
36. 36.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
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 change it (b) we measure it (c) we keep it the same
38. 38.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
39. 39.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) turmeric powder (d) a pencil and tape
40. 40.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed

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