Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 214 · 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.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
2. 2.⚖️ 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
3. 3.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a heavier bob (d) a longer string
4. 4.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 12 seconds?
5. 5.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a pencil and tape (d) a magnet
7. 7.⚖️ 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
8. 8.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) heavier (d) slower
9. 9.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a stopwatch (c) a ruler (d) a string
10. 10.⚖️ 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
11. 11.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a battery cell (c) yeast (d) a pencil and tape
12. 12.🧺 Which of these is needed for the pendulum? (a) a balloon (b) turmeric powder (c) a battery cell (d) a heavy nut or washer
13. 13.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it doubles (d) it halves
14. 14.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) a heavy nut or washer (d) turmeric powder
15. 15.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
16. 16.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the string (c) the wind (d) magnetism
17. 17.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
18. 18.🛟 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
19. 19.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
20. 20.⚖️ 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
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a ruler (c) a stopwatch (d) a string
22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a mirror (c) a ruler (d) a string
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) the same hook (c) the string length (d) the weight of the bob
24. 24.True or false: a battery cell is needed for the pendulum. (a) True (b) False
25. 25.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 32 seconds?
26. 26.True or false: a mirror is not needed for the pendulum. (a) True (b) False
27. 27.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
28. 28.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a string (c) a heavy nut or washer (d) a pencil and tape
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) the weight of the bob (c) the same hook (d) the string length
30. 30.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) it stops swinging (c) no, hardly at all (d) yes, much faster
31. 31.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) turmeric powder (c) a stopwatch (d) a ruler
33. 33.🧺 Which of these is needed for the pendulum? (a) a magnet (b) turmeric powder (c) a mirror (d) a ruler
34. 34.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) about the same (c) much faster (d) much slower
35. 35.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we keep it the same (c) we measure it
37. 37.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a digital watch (d) a grandfather clock
38. 38.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a heavy brick (d) a small nut or washer
39. 39.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) yeast (d) a pencil and tape

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