Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 928 · 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? What do we do with “time for 10 swings”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) a magnet (d) a stopwatch
3. 3.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
4. 4.🧺 Which of these is needed for the pendulum? (a) yeast (b) a battery cell (c) a pencil and tape (d) a balloon
5. 5.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) it cannot swing (d) about the same
6. 6.🧺 Which of these is not needed for the pendulum? (a) a string (b) a balloon (c) a stopwatch (d) a ruler
7. 7.True or false: a balloon is needed for the pendulum. (a) False (b) True
8. 8.⚖️ 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 weight of the bob (c) the string length
9. 9.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is hot (d) it is magnetic
10. 10.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) turmeric powder (c) a heavy nut or washer (d) a magnet
11. 11.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) heavier (d) stopped
12. 12.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a small nut or washer (d) a heavy brick
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) time for 10 swings (c) the string length (d) the same hook
14. 14.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a shorter string (c) a lighter bob (d) a heavier bob
15. 15.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
16. 16.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
17. 17.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 12 seconds?
18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a string (c) a pencil and tape (d) a stopwatch
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a ruler (c) a string (d) a heavy nut or washer
20. 20.🧺 Which of these is not needed for the pendulum? (a) a string (b) a heavy nut or washer (c) a mirror (d) a pencil and tape
21. 21.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) the wind (c) magnetism (d) gravity
22. 22.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a grandfather clock (c) a digital watch (d) a phone
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) a string (d) a balloon
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) False (b) True
25. 25.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
26. 26.⚖️ 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) time for 10 swings (c) the same hook (d) the weight of the bob
27. 27.⚖️ 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
28. 28.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) False (b) True
30. 30.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
31. 31.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it doubles (d) it becomes 4 times
32. 32.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
33. 33.⚖️ 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
34. 34.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) False (b) True
36. 36.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
37. 37.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a ruler (c) a pencil and tape (d) a heavy nut or washer
38. 38.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
39. 39.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
40. 40.⚖️ 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

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