Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 614 · 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? Which of these is the one thing we change? (a) the same hook (b) the string length (c) the weight of the bob (d) how far we pull it back
2. 2.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) slower (d) heavier
3. 3.🛟 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
4. 4.⚖️ 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
5. 5.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
6. 6.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) the bob could hit you (d) it is wet
7. 7.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it halves (d) it doubles
8. 8.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) the wind (d) gravity
9. 9.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 14 seconds?
10. 10.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a shorter string (c) a longer string (d) a heavier bob
11. 11.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a ruler (c) yeast (d) a balloon
12. 12.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a balloon (c) a stopwatch (d) a string
13. 13.⚖️ 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
14. 14.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a pencil and tape (c) a battery cell (d) a mirror
15. 15.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
16. 16.🔮 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
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we measure it (c) we keep it the same
18. 18.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a balloon (c) a stopwatch (d) yeast
19. 19.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
20. 20.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a balloon (d) a pencil and tape
22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a heavy nut or washer (c) a stopwatch (d) a ruler
23. 23.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
24. 24.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
25. 25.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more fun (c) it is more accurate (d) one swing is too slow
26. 26.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a grandfather clock (d) a digital watch
27. 27.True or false: a balloon is needed for the pendulum. (a) True (b) False
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.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
30. 30.⚖️ 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
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we keep it the same (c) we measure it
32. 32.⚖️ 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
33. 33.True or false: a mirror is needed for the pendulum. (a) False (b) True
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a ruler (d) turmeric powder
35. 35.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
36. 36.True or false: yeast is not needed for the pendulum. (a) True (b) False
37. 37.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) yes, much slower (c) no, hardly at all (d) it stops swinging
38. 38.⚖️ 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
39. 39.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 14 seconds?
40. 40.True or false: a string is not needed for the pendulum. (a) True (b) False

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