Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 190 · 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.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) True (b) False
3. 3.True or false: a mirror is needed for the pendulum. (a) False (b) True
4. 4.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is hot (d) it is magnetic
5. 5.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a ruler (c) a pencil and tape (d) a string
6. 6.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
7. 7.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
8. 8.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a string (c) a pencil and tape (d) a battery cell
9. 9.⚖️ 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
10. 10.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a heavy brick (c) a sharp tool (d) a glass bottle
11. 11.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) it stops swinging (c) yes, much faster (d) yes, much slower
12. 12.⚖️ 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 string length (c) the weight of the bob (d) how far we pull it back
13. 13.⚖️ 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) False (b) True
14. 14.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a heavy nut or washer (d) a mirror
16. 16.True or false: a ruler is not needed for the pendulum. (a) True (b) False
17. 17.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
18. 18.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a pencil and tape (c) a battery cell (d) a string
20. 20.True or false: a balloon is needed for the pendulum. (a) False (b) True
21. 21.True or false: a balloon is not needed for the pendulum. (a) False (b) True
22. 22.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 51 seconds?
23. 23.True or false: a battery cell is needed for the pendulum. (a) False (b) True
24. 24.⚖️ 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) how far we pull it back (c) the same hook (d) the string length
25. 25.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) gravity (c) magnetism (d) the wind
26. 26.⚖️ 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
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.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a sundial (d) a phone
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 keep it the same (b) we measure it (c) we change it
30. 30.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
31. 31.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) stopped (d) quicker
32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is kept the same. (a) True (b) False
33. 33.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a ruler (c) a string (d) a pencil and tape
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a magnet (d) a stopwatch
35. 35.⚖️ 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
36. 36.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it doubles (d) it stays the same
37. 37.⚖️ 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
38. 38.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
39. 39.⚖️ 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
40. 40.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) much slower (d) about the same

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