Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 91 · 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 keep it the same (b) we change it (c) we measure it
2. 2.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
3. 3.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is hot (c) it is magnetic (d) the bob could hit you
4. 4.⚖️ 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
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a string (d) a balloon
6. 6.⚖️ 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 same hook (c) the weight of the bob (d) the string length
7. 7.⚖️ 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 change it (c) we measure it
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a pencil and tape (c) a string (d) a ruler
9. 9.🔮 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
10. 10.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 18 seconds?
11. 11.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a string (c) turmeric powder (d) a magnet
12. 12.🧺 Which of these is needed for the pendulum? (a) a magnet (b) yeast (c) a balloon (d) a heavy nut or washer
13. 13.True or false: a magnet is not needed for the pendulum. (a) False (b) True
14. 14.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) yeast (d) a string
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) the weight of the bob (c) how far we pull it back (d) time for 10 swings
17. 17.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a lighter bob (d) a heavier bob
18. 18.⚖️ 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
19. 19.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
20. 20.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) the wind (d) gravity
21. 21.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a heavy brick (d) a glass bottle
22. 22.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a mirror (c) a balloon (d) a ruler
23. 23.True or false: a mirror is not needed for the pendulum. (a) True (b) False
24. 24.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a stopwatch (c) a string (d) a pencil and tape
26. 26.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) quicker (d) stopped
27. 27.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
28. 28.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
29. 29.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
30. 30.🧺 Which of these is needed for the pendulum? (a) yeast (b) a pencil and tape (c) turmeric powder (d) a battery cell
31. 31.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a string (c) a stopwatch (d) a ruler
32. 32.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) a balloon (d) a string
33. 33.⚖️ 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
34. 34.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
35. 35.True or false: a balloon is needed for the pendulum. (a) False (b) True
36. 36.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
37. 37.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
38. 38.⚖️ 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 weight of the bob (c) the string length
39. 39.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much slower (c) much faster (d) it cannot swing
40. 40.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?

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