Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 848 · 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 pencil and tape (b) a battery cell (c) a string (d) a stopwatch
2. 2.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a small nut or washer (c) a glass bottle (d) a sharp tool
3. 3.True or false: a mirror is not needed for the pendulum. (a) False (b) True
4. 4.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
5. 5.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
6. 6.⚖️ 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) the same hook
7. 7.⚖️ 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) True (b) False
8. 8.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the wind (d) the string
9. 9.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it becomes 4 times (d) it doubles
10. 10.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) it is more fun (c) 10 is a lucky number (d) one swing is too slow
11. 11.🕰️ 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
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) time for 10 swings (c) the same hook (d) how far we pull it back
13. 13.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) it is hot (d) the bob could hit you
14. 14.🔮 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
15. 15.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
16. 16.⚖️ 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 keep it the same (b) we measure it (c) we change it
17. 17.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) turmeric powder (d) a heavy nut or washer
18. 18.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a battery cell (c) a string (d) a mirror
19. 19.⚖️ 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
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a balloon (c) a stopwatch (d) a heavy nut or washer
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) the string length (c) time for 10 swings
22. 22.⚖️ 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
23. 23.⚖️ 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
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a string (c) a stopwatch (d) a heavy nut or washer
25. 25.True or false: a balloon is needed for the pendulum. (a) True (b) False
26. 26.🧺 Which of these is not needed for the pendulum? (a) a string (b) a pencil and tape (c) a mirror (d) a stopwatch
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a pencil and tape (c) a ruler (d) a stopwatch
28. 28.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
29. 29.⚖️ 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
30. 30.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
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 change it (c) we keep it the same
32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the same hook
33. 33.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
34. 34.True or false: a magnet is needed for the pendulum. (a) False (b) True
35. 35.⚖️ 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
36. 36.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
37. 37.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
38. 38.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) stopped (c) heavier (d) slower
39. 39.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a grandfather clock (d) a phone
40. 40.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 12 seconds?

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