Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 30 · 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.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
2. 2.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) quicker (d) stopped
3. 3.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a heavier bob (d) a lighter bob
4. 4.⚖️ 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 same hook (c) the string length
5. 5.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
6. 6.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) the string (c) magnetism (d) gravity
7. 7.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a glass bottle (d) a small nut or washer
8. 8.⚖️ 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
9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a stopwatch (c) a ruler (d) a pencil and tape
10. 10.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) much faster (d) it cannot swing
11. 11.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) False (b) True
13. 13.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
14. 14.⚖️ 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) True (b) False
15. 15.🔮 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
16. 16.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
17. 17.⚖️ 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) how far we pull it back
18. 18.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
19. 19.True or false: a magnet is needed for the pendulum. (a) False (b) True
20. 20.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
21. 21.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a mirror (c) a balloon (d) a pencil and tape
22. 22.True or false: a magnet is not needed for the pendulum. (a) True (b) False
23. 23.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is the one thing we change. (a) True (b) False
25. 25.⚖️ 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) time for 10 swings (c) the string length (d) the weight of the bob
26. 26.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
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) True (b) False
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
29. 29.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) it is hot (d) the bob could hit you
30. 30.True or false: yeast is not needed for the pendulum. (a) True (b) False
31. 31.⚖️ 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
32. 32.🕰️ 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
33. 33.⚖️ 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 measure it (b) we change it (c) we keep it the same
34. 34.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a stopwatch (c) a heavy nut or washer (d) a pencil and tape
35. 35.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
36. 36.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
38. 38.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 16 seconds?
39. 39.True or false: a balloon is needed for the pendulum. (a) False (b) True
40. 40.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a battery cell (c) a stopwatch (d) a string

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