Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 171 · 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.True or false: a balloon is not needed for the pendulum. (a) False (b) True
2. 2.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
3. 3.🕰️ 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) one swing is too slow (d) it is more accurate
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.⚖️ 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) time for 10 swings
6. 6.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much faster (c) much slower (d) it cannot swing
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a magnet (d) a stopwatch
8. 8.🧺 Which of these is not needed for the pendulum? (a) a string (b) a stopwatch (c) a battery cell (d) a ruler
9. 9.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a mirror (d) a heavy nut or washer
10. 10.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) gravity (d) the wind
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) the string length (c) how far we pull it back (d) time for 10 swings
12. 12.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 6 seconds?
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) how far we pull it back (c) time for 10 swings
14. 14.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) a balloon (d) a pencil and tape
16. 16.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a heavier bob (d) a lighter bob
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a pencil and tape (c) a ruler (d) a heavy nut or washer
18. 18.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
19. 19.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a small nut or washer (d) a sharp tool
20. 20.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
21. 21.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a digital watch (c) a sundial (d) a phone
22. 22.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 18 seconds?
23. 23.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much faster (c) it stops swinging (d) yes, much slower
24. 24.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) slower (d) quicker
25. 25.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
26. 26.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is wet (d) it is magnetic
27. 27.⚖️ 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
28. 28.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
29. 29.🔮 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
30. 30.⚖️ 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
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we keep it the same (c) we change it
32. 32.True or false: a ruler is not needed for the pendulum. (a) False (b) True
33. 33.True or false: a mirror is not needed for the pendulum. (a) False (b) True
34. 34.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
35. 35.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 19 seconds?
36. 36.⚖️ 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
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a heavy nut or washer (d) a battery cell
38. 38.🧺 Which of these is not needed for the pendulum? (a) a string (b) a heavy nut or washer (c) a magnet (d) a stopwatch
39. 39.⚖️ 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) True (b) False
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) True (b) False

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