Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 67 · 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.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a longer string (d) a lighter bob
2. 2.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
3. 3.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) yes, much faster (c) no, hardly at all (d) it stops swinging
4. 4.⚖️ 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
5. 5.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a magnet (c) a string (d) a ruler
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a string (c) a ruler (d) a pencil and tape
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “how far we pull it back”? (a) we change it (b) we measure it (c) we keep it the same
9. 9.🧺 Which of these is not needed for the pendulum? (a) a string (b) a pencil and tape (c) a stopwatch (d) a mirror
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a pencil and tape (d) a battery cell
11. 11.⚖️ 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
12. 12.🧺 Which of these is needed for the pendulum? (a) a string (b) a magnet (c) turmeric powder (d) a battery cell
13. 13.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is wet (c) it is hot (d) it is magnetic
14. 14.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a glass bottle (d) a small nut or washer
15. 15.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) gravity (c) the wind (d) magnetism
16. 16.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a ruler (c) turmeric powder (d) a heavy nut or washer
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a string (c) a heavy nut or washer (d) a pencil and tape
18. 18.⚖️ 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) the same hook (c) the string length (d) the weight of the bob
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) time for 10 swings (c) the string length (d) how far we pull it back
20. 20.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
21. 21.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
22. 22.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) quicker (d) heavier
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a heavy nut or washer (d) a balloon
24. 24.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a battery cell (c) a stopwatch (d) a heavy nut or washer
25. 25.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) False (b) True
27. 27.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a phone (c) a grandfather clock (d) a sundial
28. 28.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?
29. 29.⚖️ 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) True (b) False
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) True (b) False
31. 31.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) a magnet (d) a heavy nut or washer
32. 32.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
33. 33.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) a balloon (d) a stopwatch
34. 34.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it becomes 4 times (d) it stays the same
35. 35.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 8 seconds?
36. 36.True or false: a mirror is needed for the pendulum. (a) False (b) True
37. 37.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
38. 38.⚖️ 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) False (b) True
39. 39.True or false: a balloon is needed for the pendulum. (a) True (b) False
40. 40.True or false: a ruler is needed for the pendulum. (a) True (b) False

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