Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 578 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) a balloon (d) a string
2. 2.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) the weight of the bob (c) how far we pull it back (d) time for 10 swings
4. 4.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) stopped (d) heavier
5. 5.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) it is wet (d) the bob could hit you
6. 6.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
7. 7.⚖️ 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 keep it the same (c) we change it
8. 8.True or false: a string is needed for the pendulum. (a) False (b) True
9. 9.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
10. 10.⚖️ 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 change it (c) we measure it
11. 11.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) much faster (c) about the same (d) it cannot swing
12. 12.True or false: a ruler is not needed for the pendulum. (a) True (b) False
13. 13.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a sharp tool (c) a glass bottle (d) a heavy brick
14. 14.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a shorter string (c) a heavier bob (d) a longer string
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) False (b) True
16. 16.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a grandfather clock (d) a digital watch
17. 17.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
18. 18.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a magnet (c) a balloon (d) a battery cell
19. 19.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 9 seconds?
20. 20.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
21. 21.True or false: a balloon is not needed for the pendulum. (a) False (b) True
22. 22.🔮 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
23. 23.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
24. 24.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a magnet (c) a string (d) a ruler
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
26. 26.⚖️ 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
27. 27.⚖️ 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) False (b) True
28. 28.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we change it (c) we measure it
30. 30.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a string (c) a stopwatch (d) a heavy nut or washer
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) yeast (d) a ruler
33. 33.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) a mirror (d) a stopwatch
34. 34.🧺 Which of these is needed for the pendulum? (a) yeast (b) a stopwatch (c) a balloon (d) a battery cell
35. 35.⚖️ 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
36. 36.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the wind (c) magnetism (d) the string
37. 37.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
38. 38.🧺 Which of these is not needed for the pendulum? (a) a string (b) a pencil and tape (c) a balloon (d) a stopwatch
39. 39.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
40. 40.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?

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