Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 99 · 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? True or false: the same hook is the one thing we change. (a) True (b) False
2. 2.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a pencil and tape (d) a balloon
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a pencil and tape (c) a stopwatch (d) a string
4. 4.🛟 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
5. 5.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
6. 6.True or false: a heavy nut or washer is 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.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) about the same (d) much slower
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the same hook (b) how far we pull it back (c) the weight of the bob (d) the string length
10. 10.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much faster (c) yes, much slower (d) it stops swinging
11. 11.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
12. 12.⚖️ 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 keep it the same (c) we measure it
13. 13.True or false: a magnet is needed for the pendulum. (a) True (b) False
14. 14.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a lighter bob (d) a shorter string
15. 15.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a phone (c) a sundial (d) a digital watch
16. 16.True or false: a ruler is not needed for the pendulum. (a) False (b) True
17. 17.True or false: yeast is not needed for the pendulum. (a) True (b) False
18. 18.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a heavy nut or washer (d) a magnet
19. 19.🧺 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) a battery cell
20. 20.⚖️ 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
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a heavy nut or washer (c) a mirror (d) a stopwatch
22. 22.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) it is wet (d) the bob could hit you
23. 23.⚖️ 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
24. 24.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
25. 25.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
26. 26.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
27. 27.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 36 seconds?
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (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 the one thing we change. (a) True (b) False
30. 30.True or false: a string is needed for the pendulum. (a) True (b) False
31. 31.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
32. 32.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
33. 33.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
34. 34.⚖️ 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
35. 35.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
36. 36.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
37. 37.🔮 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
38. 38.⚖️ 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
39. 39.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a battery cell (c) a ruler (d) a balloon
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False

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