Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 81 · 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 change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a lighter bob (d) a longer string
2. 2.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a magnet (c) a mirror (d) a ruler
3. 3.🔮 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
4. 4.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
5. 5.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
6. 6.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a heavy brick (d) a glass bottle
7. 7.⚖️ 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
8. 8.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
9. 9.⚖️ 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
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) the string length (c) time for 10 swings
11. 11.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
12. 12.⚖️ 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
13. 13.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?
14. 14.⚖️ 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
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a ruler (d) a balloon
16. 16.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) it stops swinging (c) no, hardly at all (d) yes, much slower
17. 17.🧺 Which of these is needed for the pendulum? (a) a mirror (b) yeast (c) turmeric powder (d) a heavy nut or washer
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the weight of the bob
19. 19.🧺 Which of these is needed for the pendulum? (a) yeast (b) a battery cell (c) a stopwatch (d) a balloon
20. 20.⚖️ 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
21. 21.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) it is magnetic (d) the bob could hit you
22. 22.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) the string (c) magnetism (d) gravity
23. 23.⚖️ 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 weight of the bob (c) the string length (d) time for 10 swings
24. 24.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a digital watch (c) a sundial (d) a grandfather clock
25. 25.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) a string (d) a balloon
26. 26.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a battery cell (c) a magnet (d) a pencil and tape
27. 27.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) a ruler (d) a magnet
28. 28.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 36 seconds?
29. 29.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
30. 30.⚖️ 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
31. 31.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) turmeric powder (d) a string
32. 32.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) slower (d) quicker
33. 33.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
34. 34.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
35. 35.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
36. 36.⚖️ 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
37. 37.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
38. 38.🕰️ 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
39. 39.True or false: a string is needed for the pendulum. (a) False (b) True
40. 40.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?

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