Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 553 · 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.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) 10 is a lucky number (c) it is more fun (d) it is more accurate
2. 2.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) yeast (c) a heavy nut or washer (d) a string
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
4. 4.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a magnet (d) a stopwatch
5. 5.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
6. 6.⚖️ 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
7. 7.⚖️ 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 change it (c) we measure it
8. 8.⚖️ 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 same hook (c) the string length (d) time for 10 swings
9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a magnet (d) a string
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we keep it the same (c) we change it
11. 11.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a grandfather clock (d) a phone
12. 12.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a heavy nut or washer (c) a pencil and tape (d) a ruler
13. 13.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a pencil and tape (d) a mirror
15. 15.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
16. 16.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
17. 17.🛟 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
18. 18.True or false: a mirror is not needed for the pendulum. (a) True (b) False
19. 19.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
20. 20.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 9 seconds?
21. 21.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) much faster (c) it cannot swing (d) about the same
22. 22.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
23. 23.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 7 seconds?
24. 24.True or false: a magnet is needed for the pendulum. (a) True (b) False
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) the weight of the bob (c) the string length
26. 26.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) the bob could hit you (d) it is hot
27. 27.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
28. 28.⚖️ 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) time for 10 swings (c) the string length
29. 29.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) quicker (d) heavier
30. 30.⚖️ 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
31. 31.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
32. 32.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a heavier bob (d) a lighter bob
33. 33.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
34. 34.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
35. 35.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a stopwatch (c) a battery cell (d) a heavy nut or washer
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.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 34 seconds?
38. 38.⚖️ 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
39. 39.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
40. 40.True or false: a magnet is not needed for the pendulum. (a) True (b) False

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