Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 41 · 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 of these is not needed for the pendulum? (a) a battery cell (b) a heavy nut or washer (c) a stopwatch (d) a pencil and tape
2. 2.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a balloon (d) a pencil and tape
3. 3.⚖️ 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 keep it the same (c) we change it
4. 4.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
5. 5.True or false: a mirror is not needed for the pendulum. (a) False (b) True
6. 6.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a digital watch (c) a sundial (d) a phone
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a battery cell (c) a pencil and tape (d) a stopwatch
8. 8.True or false: yeast is not needed for the pendulum. (a) True (b) False
9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) turmeric powder (d) a stopwatch
10. 10.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a balloon (c) a ruler (d) a mirror
11. 11.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
13. 13.⚖️ 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) False (b) True
14. 14.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
15. 15.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) turmeric powder (c) a string (d) a heavy nut or washer
16. 16.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?
17. 17.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
18. 18.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) 10 is a lucky number (c) it is more accurate (d) one swing is too slow
19. 19.True or false: a string is needed for the pendulum. (a) True (b) False
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) how far we pull it back (b) the weight of the bob (c) the string length (d) time for 10 swings
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we change it (c) we measure it
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we measure it (c) we change it
23. 23.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a longer string (d) a lighter bob
24. 24.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
25. 25.🧺 Which of these is needed for the pendulum? (a) a string (b) a magnet (c) yeast (d) a battery cell
26. 26.⚖️ 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
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we change it (c) we keep it the same
28. 28.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
29. 29.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
30. 30.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
31. 31.True or false: a string is not needed for the pendulum. (a) False (b) True
32. 32.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the string (d) the wind
33. 33.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) heavier (d) quicker
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) how far we pull it back (c) time for 10 swings (d) the string length
35. 35.⚖️ 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
36. 36.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is magnetic (d) it is wet
37. 37.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a ruler (d) a mirror
38. 38.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a magnet (c) a battery cell (d) a pencil and tape
39. 39.⚖️ 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
40. 40.🛟 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

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