Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 426 · 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? Which of these is what we measure? (a) time for 10 swings (b) the same hook (c) how far we pull it back (d) the weight of the bob
2. 2.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
3. 3.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
4. 4.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
5. 5.⚖️ 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 keep it the same (c) we measure it
6. 6.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
7. 7.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a digital watch (d) a sundial
8. 8.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
9. 9.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) gravity (d) the wind
10. 10.🔮 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 doubles (d) it becomes 4 times
11. 11.⚖️ 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
12. 12.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 18 seconds?
13. 13.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is hot (d) it is magnetic
14. 14.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) 10 is a lucky number (c) it is more accurate (d) one swing is too slow
15. 15.⚖️ 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
16. 16.⚖️ 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
17. 17.True or false: a ruler is not needed for the pendulum. (a) True (b) False
18. 18.⚖️ 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) False (b) True
19. 19.⚖️ 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
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a battery cell (c) a heavy nut or washer (d) a stopwatch
21. 21.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
22. 22.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
23. 23.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 16 seconds?
24. 24.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
25. 25.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a pencil and tape (c) a balloon (d) a mirror
26. 26.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a small nut or washer (d) a sharp tool
27. 27.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a longer string (d) a lighter bob
28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a magnet (d) a string
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) the weight of the bob (c) how far we pull it back (d) the same hook
30. 30.🔮 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
31. 31.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 19 seconds?
32. 32.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much slower (c) yes, much faster (d) no, hardly at all
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) yeast (d) a ruler
34. 34.⚖️ 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 keep it the same (c) we measure it
35. 35.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
36. 36.True or false: a balloon is needed for the pendulum. (a) False (b) True
37. 37.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
38. 38.True or false: a ruler is needed for the pendulum. (a) True (b) False
39. 39.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
40. 40.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) heavier (d) stopped

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