Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 723 · 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 heavy nut or washer for the pendulum? (a) needed (b) not needed
2. 2.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a sundial (d) a phone
3. 3.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a balloon (c) a string (d) a ruler
4. 4.🧺 Which of these is needed for the pendulum? (a) a magnet (b) turmeric powder (c) a string (d) a battery cell
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the weight of the bob (c) time for 10 swings
6. 6.⚖️ 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
7. 7.🧺 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 stopwatch
8. 8.🛟 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
9. 9.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a small nut or washer (d) a heavy brick
10. 10.🧺 Which of these is needed for the pendulum? (a) yeast (b) a magnet (c) a battery cell (d) a pencil and tape
11. 11.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 17 seconds?
12. 12.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a longer string (d) a heavier bob
13. 13.🧺 Which of these is not needed for the pendulum? (a) a string (b) a heavy nut or washer (c) a mirror (d) a pencil and tape
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a balloon (d) a pencil and tape
15. 15.True or false: a magnet is needed for the pendulum. (a) False (b) True
16. 16.⚖️ 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
17. 17.⚖️ 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
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) time for 10 swings (c) the weight of the bob (d) the string length
19. 19.True or false: a mirror is not needed for the pendulum. (a) False (b) True
20. 20.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
21. 21.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 18 seconds?
22. 22.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
23. 23.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
24. 24.🧺 Which of these is needed for the pendulum? (a) a magnet (b) yeast (c) a ruler (d) a mirror
25. 25.⚖️ 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
26. 26.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
27. 27.True or false: a ruler is not needed for the pendulum. (a) True (b) False
28. 28.⚖️ 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
29. 29.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) 10 is a lucky number (c) one swing is too slow (d) it is more accurate
30. 30.True or false: a string is needed for the pendulum. (a) False (b) True
31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a string (c) a ruler (d) a pencil and tape
32. 32.⚖️ 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
33. 33.⚖️ 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
34. 34.🔮 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
35. 35.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a heavy nut or washer (c) yeast (d) turmeric powder
36. 36.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
37. 37.True or false: a mirror is not needed for the pendulum. (a) False (b) True
38. 38.True or false: a mirror is needed for the pendulum. (a) True (b) False
39. 39.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
40. 40.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) quicker (d) heavier

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