Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 72 · 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 change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a shorter string (d) a longer string
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) time for 10 swings (c) the same hook (d) the weight of the bob
3. 3.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
4. 4.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) it cannot swing (c) much slower (d) about the same
5. 5.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a battery cell (c) yeast (d) a string
6. 6.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
7. 7.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
8. 8.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
9. 9.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
10. 10.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a ruler (c) turmeric powder (d) yeast
11. 11.⚖️ 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) time for 10 swings (c) the string length (d) the weight of the bob
12. 12.True or false: a magnet is not needed for the pendulum. (a) True (b) False
13. 13.🛟 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
14. 14.⚖️ 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
15. 15.⚖️ 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 measure it (c) we change it
16. 16.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 15 seconds?
17. 17.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
18. 18.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) False (b) True
20. 20.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much slower (c) yes, much faster (d) no, hardly at all
21. 21.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a grandfather clock (d) a phone
22. 22.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
23. 23.🔮 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 becomes 4 times (d) it doubles
24. 24.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the string (d) the wind
25. 25.🧺 Which of these is not needed for the pendulum? (a) a string (b) turmeric powder (c) a stopwatch (d) a pencil and tape
26. 26.⚖️ 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 measure it (c) we keep it the same
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a string (c) a ruler (d) a stopwatch
28. 28.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) slower (d) heavier
29. 29.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
30. 30.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
31. 31.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is magnetic (d) it is wet
32. 32.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) turmeric powder (c) a battery cell (d) a balloon
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a mirror (c) a ruler (d) a string
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
35. 35.⚖️ 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) time for 10 swings (c) the string length
36. 36.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a heavy nut or washer (c) a ruler (d) a stopwatch
38. 38.True or false: a string is needed for the pendulum. (a) False (b) True
39. 39.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
40. 40.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True

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