Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 967 · 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.🧺 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 heavy nut or washer
2. 2.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 27 seconds?
3. 3.⚖️ 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 keep it the same (c) we measure it
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a string (c) a pencil and tape (d) a ruler
5. 5.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a glass bottle (d) a heavy brick
6. 6.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
7. 7.⚖️ 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
8. 8.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
9. 9.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) the bob could hit you (d) it is magnetic
10. 10.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a grandfather clock (d) a digital watch
11. 11.⚖️ 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) time for 10 swings (c) the string length (d) the weight of the bob
12. 12.⚖️ 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
13. 13.🧺 Which of these is needed for the pendulum? (a) yeast (b) a battery cell (c) a heavy nut or washer (d) a mirror
14. 14.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it doubles (c) it stays the same (d) it becomes 4 times
15. 15.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) it stops swinging (c) no, hardly at all (d) yes, much slower
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a string (d) a battery cell
17. 17.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) magnetism (c) the string (d) gravity
18. 18.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
19. 19.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 12 seconds?
20. 20.⚖️ 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
21. 21.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
22. 22.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
23. 23.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
24. 24.⚖️ 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 keep it the same (c) we change it
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
26. 26.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
27. 27.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
28. 28.True or false: a string is not needed for the pendulum. (a) False (b) True
29. 29.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a shorter string (c) a heavier bob (d) a lighter bob
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) how far we pull it back (c) time for 10 swings (d) the weight of the bob
31. 31.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a balloon (c) a string (d) a pencil and tape
33. 33.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) a heavy nut or washer (d) a mirror
34. 34.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 7 seconds?
35. 35.True or false: a ruler is needed for the pendulum. (a) False (b) True
36. 36.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we keep it the same (c) we measure it
38. 38.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
39. 39.⚖️ 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
40. 40.True or false: a string is needed for the pendulum. (a) False (b) True

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