Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 804 · 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.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 6 seconds?
2. 2.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is wet (d) it is magnetic
3. 3.True or false: a mirror is needed for the pendulum. (a) False (b) True
4. 4.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) much faster (d) about the same
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is kept the same. (a) True (b) False
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a battery cell (c) a string (d) a pencil and tape
7. 7.⚖️ 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) the weight of the bob
8. 8.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
9. 9.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
10. 10.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
11. 11.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 36 seconds?
12. 12.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more fun (c) it is more accurate (d) one swing is too slow
13. 13.⚖️ 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) False (b) True
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we measure it (c) we keep it the same
15. 15.🛟 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
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) True (b) False
17. 17.⚖️ 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 change it (c) we keep it the same
18. 18.⚖️ 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
19. 19.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the wind (c) magnetism (d) the string
20. 20.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 17 seconds?
21. 21.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a mirror (c) a heavy nut or washer (d) a ruler
22. 22.True or false: a balloon is not needed for the pendulum. (a) True (b) False
23. 23.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
24. 24.⚖️ 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) the same hook (d) time for 10 swings
25. 25.🔮 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 doubles (d) it stays the same
26. 26.True or false: a string is needed for the pendulum. (a) True (b) False
27. 27.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
28. 28.⚖️ 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
29. 29.⚖️ 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
30. 30.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) heavier (c) slower (d) stopped
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) time for 10 swings (c) the string length
32. 32.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a digital watch (c) a sundial (d) a phone
33. 33.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) a ruler (d) turmeric powder
34. 34.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
35. 35.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
36. 36.⚖️ 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
37. 37.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) a battery cell (d) a string
38. 38.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
39. 39.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 26 seconds?
40. 40.⚖️ 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

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