Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 242 · 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.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
2. 2.⚖️ 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 string length (c) time for 10 swings (d) the same hook
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True
4. 4.⚖️ 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
5. 5.🔮 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
6. 6.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
7. 7.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
8. 8.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
9. 9.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a heavy nut or washer (c) a mirror (d) a balloon
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) the string length (c) how far we pull it back
11. 11.True or false: a ruler is not needed for the pendulum. (a) False (b) True
12. 12.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) the string length (c) time for 10 swings
14. 14.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 10 seconds?
15. 15.🧺 Which of these is needed for the pendulum? (a) yeast (b) a ruler (c) a battery cell (d) a magnet
16. 16.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 28 seconds?
17. 17.🛟 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
18. 18.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) much faster (d) it cannot swing
19. 19.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
20. 20.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a lighter bob (d) a longer string
21. 21.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 20 seconds?
22. 22.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a grandfather clock (c) a phone (d) a digital watch
23. 23.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) yes, much slower (c) no, hardly at all (d) it stops swinging
24. 24.⚖️ 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) False (b) True
25. 25.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the wind (d) the string
26. 26.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is hot (c) it is magnetic (d) the bob could hit you
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) turmeric powder (c) a stopwatch (d) a ruler
28. 28.True or false: a battery cell is needed for the pendulum. (a) False (b) True
29. 29.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) stopped (d) heavier
30. 30.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
31. 31.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (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) True (b) False
34. 34.True or false: a magnet is needed for the pendulum. (a) True (b) False
35. 35.⚖️ 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 measure it (b) we keep it the same (c) we change it
36. 36.True or false: a ruler is needed for the pendulum. (a) False (b) True
37. 37.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 45 seconds?
38. 38.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
39. 39.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
40. 40.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more accurate (c) it is more fun (d) one swing is too slow

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