Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 295 · 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 “the string length”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a string (d) yeast
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 measure it (b) we keep it the same (c) we change it
4. 4.⚖️ 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
5. 5.⚖️ 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 string length (c) time for 10 swings (d) the weight of the bob
6. 6.True or false: a balloon is not needed for the pendulum. (a) False (b) True
7. 7.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
8. 8.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
9. 9.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is magnetic (d) it is wet
10. 10.⚖️ 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
11. 11.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a ruler (c) a stopwatch (d) a heavy nut or washer
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a battery cell (c) a pencil and tape (d) a ruler
14. 14.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) time for 10 swings (c) the same hook (d) how far we pull it back
16. 16.True or false: a ruler is not needed for the pendulum. (a) False (b) True
17. 17.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a small nut or washer (d) a glass bottle
18. 18.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a phone (d) a grandfather clock
19. 19.True or false: a string is not needed for the pendulum. (a) False (b) True
20. 20.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 18 seconds?
21. 21.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) slower (d) quicker
22. 22.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 7 seconds?
23. 23.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a stopwatch (c) a heavy nut or washer (d) a ruler
24. 24.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
25. 25.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
26. 26.⚖️ 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 string length (c) how far we pull it back
27. 27.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
29. 29.⚖️ 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
30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a magnet (c) a string (d) a pencil and tape
31. 31.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
32. 32.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a mirror (c) turmeric powder (d) a ruler
33. 33.🕰️ 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
34. 34.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
35. 35.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) a stopwatch (d) a battery cell
36. 36.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
37. 37.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a heavier bob (d) a lighter bob
38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) True (b) False
39. 39.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) it cannot swing (d) about the same
40. 40.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?

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