Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 777 · 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 the one thing we change? (a) time for 10 swings (b) the same hook (c) the string length (d) how far we pull it back
2. 2.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) the bob could hit you (d) it is magnetic
3. 3.⚖️ 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 change it (c) we keep it the same
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we measure it (c) we change it
5. 5.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) stopped (d) quicker
6. 6.⚖️ 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
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we change it (c) we measure it
8. 8.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
9. 9.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a grandfather clock (d) a digital watch
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a balloon (d) a pencil and tape
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) how far we pull it back (c) the weight of the bob (d) time for 10 swings
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) yeast (c) a ruler (d) a string
14. 14.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it doubles (c) it stays the same (d) it becomes 4 times
15. 15.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
16. 16.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 18 seconds?
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) turmeric powder (c) a ruler (d) a heavy nut or washer
18. 18.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a longer string (d) a heavier bob
19. 19.⚖️ 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
20. 20.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a battery cell (c) a balloon (d) a mirror
21. 21.True or false: a battery cell is needed for the pendulum. (a) True (b) False
22. 22.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
23. 23.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 14 seconds?
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a heavy nut or washer (d) a battery cell
25. 25.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a stopwatch (c) a magnet (d) a mirror
26. 26.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a heavy brick (c) a sharp tool (d) a glass bottle
27. 27.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a magnet (c) a string (d) a pencil and tape
29. 29.True or false: a mirror is not needed for the pendulum. (a) True (b) False
30. 30.True or false: a ruler is not needed for the pendulum. (a) True (b) False
31. 31.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) it is more fun (c) 10 is a lucky number (d) one swing is too slow
32. 32.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
33. 33.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a mirror (c) a pencil and tape (d) a string
34. 34.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) it stops swinging (c) yes, much slower (d) no, hardly at all
35. 35.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 26 seconds?
36. 36.⚖️ 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
37. 37.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
38. 38.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 28 seconds?
39. 39.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) gravity (d) the wind
40. 40.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?

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