Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 980 · 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 stopwatch is needed for the pendulum. (a) False (b) True
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we keep it the same (c) we change it
3. 3.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is wet (d) it is hot
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a heavy nut or washer (c) a pencil and tape (d) a stopwatch
5. 5.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it doubles (c) it halves (d) it becomes 4 times
6. 6.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) much faster (d) it cannot swing
7. 7.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) quicker (d) slower
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) how far we pull it back (c) the same hook (d) the string length
9. 9.⚖️ 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) False (b) True
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) turmeric powder (c) a string (d) a pencil and tape
11. 11.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a pencil and tape (c) a magnet (d) yeast
12. 12.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 18 seconds?
13. 13.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much faster (c) no, hardly at all (d) yes, much slower
14. 14.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 39 seconds?
15. 15.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
16. 16.⚖️ 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
17. 17.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) the string length (c) the weight of the bob (d) how far we pull it back
19. 19.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
20. 20.⚖️ 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
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a ruler (d) a balloon
22. 22.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
23. 23.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a shorter string (c) a heavier bob (d) a longer string
24. 24.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a pencil and tape (c) a ruler (d) a heavy nut or washer
25. 25.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
26. 26.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
27. 27.🕰️ 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 accurate (d) it is more fun
28. 28.True or false: a magnet is not needed for the pendulum. (a) True (b) False
29. 29.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
30. 30.🧺 Which of these is not needed for the pendulum? (a) a string (b) a stopwatch (c) a mirror (d) a heavy nut or washer
31. 31.🧺 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) a magnet (d) a string
32. 32.True or false: a string is not needed for the pendulum. (a) True (b) False
33. 33.True or false: a ruler is not needed for the pendulum. (a) True (b) False
34. 34.🛟 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
35. 35.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
36. 36.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
37. 37.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
38. 38.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
39. 39.🧺 Which of these is needed for the pendulum? (a) a balloon (b) turmeric powder (c) a battery cell (d) a string
40. 40.🧺 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 pencil and tape

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