Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 886 · 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: the weight of the bob is kept the same. (a) True (b) False
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.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) quicker (c) slower (d) stopped
4. 4.True or false: a string is not needed for the pendulum. (a) True (b) False
5. 5.True or false: a battery cell is needed for the pendulum. (a) False (b) True
6. 6.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much slower (c) much faster (d) it cannot swing
7. 7.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
8. 8.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it halves (c) it doubles (d) it stays the same
9. 9.⚖️ 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) False (b) True
10. 10.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a phone (d) a sundial
11. 11.⚖️ 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) True (b) False
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) the string length (c) time for 10 swings
13. 13.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a battery cell (c) a pencil and tape (d) a magnet
14. 14.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is magnetic (c) it is wet (d) it is hot
15. 15.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) magnetism (c) the wind (d) the string
16. 16.True or false: a mirror is needed for the pendulum. (a) True (b) False
17. 17.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a sharp tool (c) a heavy brick (d) a glass bottle
18. 18.⚖️ 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
19. 19.True or false: yeast is needed for the pendulum. (a) False (b) True
20. 20.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
21. 21.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
22. 22.⚖️ 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 measure it (b) we keep it the same (c) we change it
23. 23.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a pencil and tape (c) a string (d) a mirror
24. 24.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
25. 25.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
26. 26.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a heavy nut or washer (d) a balloon
28. 28.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
29. 29.True or false: a magnet is needed for the pendulum. (a) False (b) True
30. 30.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
31. 31.⚖️ 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
32. 32.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
33. 33.True or false: a string is needed for the pendulum. (a) False (b) True
34. 34.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a balloon (c) a magnet (d) a ruler
35. 35.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
36. 36.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
37. 37.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a string (c) turmeric powder (d) a balloon
38. 38.⚖️ 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) time for 10 swings
39. 39.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a lighter bob (d) a longer string
40. 40.🕰️ 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) it is more fun (d) one swing is too slow

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