Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 235 · 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 measure it (c) we keep it the same
2. 2.⚖️ 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 change it (c) we measure it
3. 3.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 13 seconds?
4. 4.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it doubles (c) it halves (d) it stays the same
5. 5.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is wet (d) it is magnetic
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a heavy nut or washer (c) a string (d) a stopwatch
7. 7.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a magnet (c) a battery cell (d) a ruler
8. 8.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a small nut or washer (d) a sharp tool
9. 9.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) about the same (d) it cannot swing
10. 10.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a phone (d) a grandfather clock
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 weight of the bob (b) time for 10 swings (c) how far we pull it back (d) the string length
12. 12.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
13. 13.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
14. 14.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) slower (d) quicker
15. 15.True or false: a battery cell is needed for the pendulum. (a) False (b) True
16. 16.⚖️ 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) how far we pull it back (c) the same hook (d) time for 10 swings
17. 17.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a balloon (c) a stopwatch (d) a magnet
18. 18.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a pencil and tape (c) a heavy nut or washer (d) a ruler
19. 19.⚖️ 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
20. 20.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a longer string (c) a heavier bob (d) a shorter string
21. 21.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a battery cell (c) a pencil and tape (d) a magnet
22. 22.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
23. 23.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) it stops swinging (c) yes, much slower (d) no, hardly at all
24. 24.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
25. 25.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 14 seconds?
26. 26.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
28. 28.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) 10 is a lucky number (c) one swing is too slow (d) it is more fun
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a string (d) a battery cell
30. 30.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
31. 31.True or false: a mirror is not needed for the pendulum. (a) True (b) False
32. 32.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) the wind (c) magnetism (d) gravity
33. 33.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
34. 34.⚖️ 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
35. 35.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a mirror (c) a string (d) a heavy nut or washer
36. 36.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a pencil and tape (c) turmeric powder (d) a heavy nut or washer
37. 37.True or false: a ruler is not needed for the pendulum. (a) True (b) False
38. 38.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
39. 39.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is the one thing we change. (a) True (b) False

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