Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 761 · 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 kept the same? (a) the string length (b) the same hook (c) time for 10 swings
2. 2.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) time for 10 swings (c) how far we pull it back (d) the string length
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
5. 5.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
6. 6.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
7. 7.True or false: a magnet is not needed for the pendulum. (a) False (b) True
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) yeast (d) a stopwatch
9. 9.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a sharp tool (c) a glass bottle (d) a heavy brick
10. 10.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) magnetism (c) the string (d) gravity
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is kept the same. (a) True (b) False
12. 12.🕰️ 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
13. 13.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
14. 14.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it stays the same (d) it becomes 4 times
15. 15.🛟 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
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a ruler (c) a stopwatch (d) a string
17. 17.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
18. 18.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) no, hardly at all (c) yes, much slower (d) it stops swinging
19. 19.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) a heavy nut or washer (d) a magnet
20. 20.True or false: a mirror is needed for the pendulum. (a) False (b) True
21. 21.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
22. 22.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) a pencil and tape (d) a balloon
23. 23.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 48 seconds?
24. 24.True or false: a balloon is needed for the pendulum. (a) True (b) False
25. 25.🧺 Which of these is needed for the pendulum? (a) yeast (b) a stopwatch (c) a balloon (d) a magnet
26. 26.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) quicker (d) heavier
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a mirror (d) a heavy nut or washer
28. 28.🧺 Which of these is needed for the pendulum? (a) a ruler (b) a magnet (c) a battery cell (d) turmeric powder
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) True (b) False
30. 30.⚖️ 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) time for 10 swings (d) the same hook
31. 31.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
32. 32.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
33. 33.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a phone (c) a grandfather clock (d) a digital watch
34. 34.⚖️ 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
35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we measure it (c) we keep it the same
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a balloon (d) a ruler
37. 37.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
38. 38.⚖️ 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 measure it (c) we keep it the same
39. 39.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a stopwatch (c) a balloon (d) a string
40. 40.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a lighter bob (d) a shorter string

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