Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 702 · 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.⚖️ 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
2. 2.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a shorter string (c) a heavier bob (d) a longer string
3. 3.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is magnetic (c) it is hot (d) it is wet
4. 4.⚖️ 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
5. 5.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a phone (c) a sundial (d) a digital watch
6. 6.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
7. 7.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
8. 8.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) a pencil and tape (d) turmeric powder
9. 9.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) it stops swinging (c) no, hardly at all (d) yes, much faster
10. 10.True or false: a ruler is not needed for the pendulum. (a) True (b) False
11. 11.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
12. 12.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
13. 13.⚖️ 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 string length (c) the same hook (d) time for 10 swings
14. 14.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) quicker (d) heavier
15. 15.⚖️ 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
16. 16.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 10 seconds?
17. 17.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a pencil and tape (c) a string (d) a ruler
18. 18.⚖️ 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
19. 19.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
20. 20.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
21. 21.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) magnetism (c) the string (d) gravity
22. 22.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a glass bottle (d) a small nut or washer
23. 23.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) much faster (d) it cannot swing
24. 24.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
25. 25.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a mirror (c) a stopwatch (d) a string
26. 26.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a stopwatch (c) a magnet (d) a balloon
27. 27.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it stays the same (d) it doubles
28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a stopwatch (c) a ruler (d) a heavy nut or washer
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a string (d) a mirror
30. 30.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a pencil and tape (c) a string (d) a battery cell
31. 31.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
32. 32.True or false: a balloon is needed for the pendulum. (a) False (b) True
33. 33.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a string (c) turmeric powder (d) a battery cell
34. 34.True or false: yeast is not needed for the pendulum. (a) True (b) False
35. 35.True or false: a balloon is not needed for the pendulum. (a) False (b) True
36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the same hook (c) time for 10 swings
37. 37.🕰️ 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) it is more fun (d) 10 is a lucky number
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a heavy nut or washer (d) turmeric powder
39. 39.⚖️ 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
40. 40.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 51 seconds?

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