Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 912 · 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 kept the same? (a) the string length (b) time for 10 swings (c) the weight of the bob
2. 2.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
3. 3.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
4. 4.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a lighter bob (c) a heavier bob (d) a shorter string
5. 5.⚖️ 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 measure it (c) we change it
6. 6.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
7. 7.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
8. 8.True or false: a magnet is needed for the pendulum. (a) False (b) True
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) time for 10 swings (c) the same hook (d) the string length
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a mirror (c) a ruler (d) a stopwatch
11. 11.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) it cannot swing (c) much slower (d) much faster
12. 12.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
13. 13.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) stopped (d) quicker
14. 14.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
15. 15.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 16 seconds?
16. 16.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a balloon (c) a string (d) a stopwatch
17. 17.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a heavy nut or washer (c) a balloon (d) a magnet
18. 18.⚖️ 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 string length (c) the weight of the bob (d) time for 10 swings
19. 19.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
20. 20.⚖️ 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
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) how far we pull it back (c) time for 10 swings
22. 22.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
23. 23.⚖️ 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 change it (c) we keep it the same
24. 24.🛟 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
25. 25.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
26. 26.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a grandfather clock (d) a digital watch
27. 27.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
28. 28.True or false: a balloon is needed for the pendulum. (a) True (b) False
29. 29.⚖️ 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
30. 30.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) True (b) False
32. 32.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much faster (c) yes, much slower (d) it stops swinging
33. 33.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is magnetic (d) it is wet
34. 34.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a stopwatch (c) a magnet (d) a mirror
35. 35.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
36. 36.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 7 seconds?
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a ruler (c) a heavy nut or washer (d) a string
38. 38.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a string (c) yeast (d) a battery cell
39. 39.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it stays the same (c) it doubles (d) it becomes 4 times
40. 40.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed

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