Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 644 · 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 of these is needed for the pendulum? (a) yeast (b) a mirror (c) a string (d) turmeric powder
2. 2.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it becomes 4 times (d) it doubles
3. 3.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a shorter string (d) a lighter bob
4. 4.True or false: a ruler is not needed for the pendulum. (a) False (b) True
5. 5.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) gravity (d) the wind
6. 6.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a grandfather clock (c) a digital watch (d) a phone
7. 7.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) slower (d) quicker
8. 8.True or false: a string is not needed for the pendulum. (a) False (b) True
9. 9.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
10. 10.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
11. 11.⚖️ 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
12. 12.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
13. 13.⚖️ 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) the weight of the bob (c) the string length (d) time for 10 swings
14. 14.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is magnetic (d) it is hot
15. 15.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a stopwatch (c) a balloon (d) a magnet
16. 16.True or false: a mirror is needed for the pendulum. (a) True (b) False
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a heavy nut or washer (c) a string (d) a stopwatch
18. 18.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a glass bottle (d) a small nut or washer
19. 19.⚖️ 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
20. 20.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?
21. 21.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
22. 22.⚖️ 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
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) turmeric powder (d) a heavy nut or washer
24. 24.⚖️ 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) False (b) True
25. 25.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a balloon (c) a mirror (d) a heavy nut or washer
26. 26.⚖️ 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 keep it the same (b) we change it (c) we measure it
27. 27.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
28. 28.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a magnet (c) a string (d) a pencil and tape
30. 30.⚖️ 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 measure it (c) we keep it the same
31. 31.True or false: a magnet is needed for the pendulum. (a) True (b) False
32. 32.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a balloon (c) a ruler (d) a string
33. 33.⚖️ 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
34. 34.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) no, hardly at all (c) yes, much faster (d) yes, much slower
35. 35.True or false: a balloon is not needed for the pendulum. (a) True (b) False
36. 36.⚖️ 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
37. 37.🧺 Which of these is needed for the pendulum? (a) yeast (b) turmeric powder (c) a balloon (d) a ruler
38. 38.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
39. 39.🧺 Which of these is not needed for the pendulum? (a) a string (b) a stopwatch (c) a mirror (d) a heavy nut or washer
40. 40.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) about the same (d) it cannot swing

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