Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 75 · 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 “time for 10 swings”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.True or false: a balloon is needed for the pendulum. (a) False (b) True
3. 3.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) it is hot (d) the bob could hit you
4. 4.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much slower (c) it stops swinging (d) yes, much faster
5. 5.True or false: a mirror is not needed for the pendulum. (a) False (b) True
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) yeast (d) a heavy nut or washer
7. 7.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
8. 8.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) quicker (d) slower
9. 9.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the string (c) magnetism (d) the wind
10. 10.⚖️ 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
11. 11.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it stays the same (d) it doubles
12. 12.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
13. 13.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a string (c) a stopwatch (d) a heavy nut or washer
14. 14.⚖️ 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
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a balloon (d) a heavy nut or washer
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) how far we pull it back (c) time for 10 swings (d) the string length
17. 17.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) about the same (d) much faster
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a sundial (c) a phone (d) a digital watch
20. 20.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 33 seconds?
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.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a small nut or washer (c) a heavy brick (d) a sharp tool
23. 23.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
24. 24.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a pencil and tape (c) a heavy nut or washer (d) a string
25. 25.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
27. 27.🧺 Which of these is needed for the pendulum? (a) yeast (b) a battery cell (c) a mirror (d) a pencil and tape
28. 28.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
29. 29.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a lighter bob (c) a shorter string (d) a heavier bob
30. 30.⚖️ 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
31. 31.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more fun (c) 10 is a lucky number (d) it is more accurate
32. 32.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a ruler (d) a battery cell
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) a mirror (d) a pencil and tape
35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) False (b) True
36. 36.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
37. 37.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a pencil and tape (c) a stopwatch (d) a string
38. 38.True or false: yeast is needed for the pendulum. (a) False (b) True
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) turmeric powder (d) a pencil and tape
40. 40.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed

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