Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 37 · 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 ruler for the pendulum? (a) not needed (b) needed
2. 2.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
3. 3.⚖️ 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 keep it the same (b) we change it (c) we measure it
4. 4.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
5. 5.⚖️ 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) the string length (c) the weight of the bob (d) time for 10 swings
6. 6.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
7. 7.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) True (b) False
9. 9.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
10. 10.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a longer string (d) a shorter string
11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a battery cell (d) a heavy nut or washer
12. 12.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is wet (c) it is hot (d) it is magnetic
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) the weight of the bob (c) the same hook (d) how far we pull it back
14. 14.True or false: yeast is needed for the pendulum. (a) True (b) False
15. 15.⚖️ 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) False (b) True
16. 16.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it halves (c) it stays the same (d) it doubles
17. 17.True or false: a ruler is not needed for the pendulum. (a) False (b) True
18. 18.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a grandfather clock (d) a phone
19. 19.⚖️ 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
20. 20.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
21. 21.⚖️ 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
22. 22.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a balloon (d) a pencil and tape
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) turmeric powder (c) a pencil and tape (d) a heavy nut or washer
24. 24.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 9 seconds?
25. 25.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a sharp tool (d) a small nut or washer
26. 26.⚖️ 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
27. 27.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a stopwatch (c) a string (d) yeast
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we measure it (c) we keep it the same
29. 29.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
30. 30.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) one swing is too slow (c) it is more accurate (d) it is more fun
31. 31.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a battery cell (c) a balloon (d) a pencil and tape
32. 32.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
33. 33.True or false: a balloon is not needed for the pendulum. (a) False (b) True
34. 34.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 57 seconds?
35. 35.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 8 seconds?
36. 36.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) the wind (d) gravity
37. 37.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
38. 38.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
39. 39.🧺 Which of these is needed for the pendulum? (a) a string (b) a mirror (c) yeast (d) turmeric powder
40. 40.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) a magnet (d) a pencil and tape

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