Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 903 · 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) how far we pull it back (b) the weight of the bob (c) the same hook (d) the string length
2. 2.⚖️ 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 change it (c) we measure it
3. 3.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
4. 4.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
5. 5.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) a ruler (d) a magnet
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) the string length (c) time for 10 swings
7. 7.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) heavier (d) stopped
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 stays the same (d) it doubles
9. 9.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a mirror (d) a pencil and tape
10. 10.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
11. 11.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) it is magnetic (d) the bob could hit you
12. 12.⚖️ 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
13. 13.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
14. 14.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a sharp tool (c) a glass bottle (d) a heavy brick
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a pencil and tape (c) turmeric powder (d) a string
16. 16.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) turmeric powder (c) a string (d) a pencil and tape
17. 17.True or false: a ruler is needed for the pendulum. (a) False (b) True
18. 18.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) magnetism (c) the string (d) the wind
19. 19.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
20. 20.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more fun (c) 10 is a lucky number (d) it is more accurate
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) yeast (c) a string (d) a heavy nut or washer
22. 22.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?
23. 23.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
24. 24.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a phone (d) a grandfather clock
25. 25.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 18 seconds?
26. 26.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) True (b) False
28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a balloon (c) a pencil and tape (d) a string
29. 29.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
30. 30.True or false: a ruler is not needed for the pendulum. (a) True (b) False
31. 31.⚖️ 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 keep it the same (c) we change it
32. 32.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a shorter string (d) a longer string
33. 33.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
34. 34.⚖️ 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
35. 35.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) a ruler (d) yeast
36. 36.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
37. 37.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
38. 38.True or false: a string is needed for the pendulum. (a) True (b) False
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) the string length (c) how far we pull it back
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a pencil and tape (c) a ruler (d) a string

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