Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 722 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a balloon (d) a heavy nut or washer
2. 2.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) much faster (d) about the same
3. 3.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 48 seconds?
4. 4.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it halves (c) it doubles (d) it stays the same
5. 5.🛟 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
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a heavy nut or washer (c) a string (d) a stopwatch
7. 7.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a heavy brick (d) a sharp tool
8. 8.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a pencil and tape (c) turmeric powder (d) a ruler
10. 10.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) a mirror (d) a string
12. 12.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a string (d) yeast
14. 14.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 10 seconds?
15. 15.True or false: a balloon is not needed for the pendulum. (a) False (b) True
16. 16.⚖️ 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
17. 17.⚖️ 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
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we keep it the same (c) we measure it
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.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
21. 21.🕰️ 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
22. 22.🧺 Do we need a string 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 11 seconds?
24. 24.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a pencil and tape (c) a battery cell (d) a heavy nut or washer
25. 25.⚖️ 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) False (b) True
26. 26.🕰️ 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) one swing is too slow (d) it is more fun
27. 27.⚖️ 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 string length (c) time for 10 swings (d) the same hook
28. 28.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
29. 29.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a ruler (c) a stopwatch (d) a pencil and tape
30. 30.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a balloon (c) a battery cell (d) a ruler
31. 31.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 18 seconds?
32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the weight of the bob (c) time for 10 swings
33. 33.🕰️ A pendulum makes 20 swings in 60 seconds. How many seconds does one swing take?
34. 34.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
35. 35.True or false: a mirror is not needed for the pendulum. (a) False (b) True
36. 36.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) the wind (d) gravity
37. 37.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
38. 38.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a digital watch (c) a sundial (d) a phone
39. 39.True or false: yeast is not needed for the pendulum. (a) False (b) True
40. 40.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a shorter string (c) a longer string (d) a heavier bob

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