Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 159 · 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.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it becomes 4 times (c) it stays the same (d) it halves
2. 2.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a shorter string (c) a heavier bob (d) a longer string
3. 3.⚖️ 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 keep it the same (c) we change it
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the same hook (c) time for 10 swings
5. 5.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
6. 6.⚖️ 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
7. 7.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a digital watch (c) a grandfather clock (d) a sundial
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) the weight of the bob (c) the string length (d) the same hook
9. 9.⚖️ 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
10. 10.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a balloon (c) a magnet (d) a string
11. 11.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) it is magnetic (d) the bob could hit you
12. 12.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
13. 13.⚖️ 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
14. 14.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) turmeric powder (c) a heavy nut or washer (d) a pencil and tape
15. 15.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
16. 16.True or false: a string is needed for the pendulum. (a) False (b) True
17. 17.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
18. 18.True or false: a mirror is not needed for the pendulum. (a) True (b) False
19. 19.True or false: yeast is not needed for the pendulum. (a) False (b) True
20. 20.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) it cannot swing (d) much faster
21. 21.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) gravity (d) the wind
22. 22.True or false: a ruler is not needed for the pendulum. (a) True (b) False
23. 23.⚖️ 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
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) the weight of the bob (c) time for 10 swings (d) the string length
25. 25.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a sharp tool (d) a small nut or washer
26. 26.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
27. 27.⚖️ 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 change it (c) we measure it
28. 28.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
29. 29.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
30. 30.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) quicker (d) stopped
31. 31.True or false: a balloon is needed for the pendulum. (a) False (b) True
32. 32.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) no, hardly at all (c) yes, much slower (d) it stops swinging
33. 33.🧺 Do we need a stopwatch 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: the same hook is kept the same. (a) False (b) True
35. 35.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
36. 36.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
37. 37.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a ruler (d) turmeric powder
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a balloon (d) a pencil and tape
40. 40.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a mirror (c) a magnet (d) yeast

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