Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 460 · 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.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a small nut or washer (c) a heavy brick (d) a sharp tool
2. 2.⚖️ 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
3. 3.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a ruler (c) a string (d) a heavy nut or washer
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) the string length (c) time for 10 swings (d) how far we pull it back
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) it cannot swing (d) much faster
7. 7.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) turmeric powder (d) a pencil and tape
9. 9.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a ruler (c) a stopwatch (d) a heavy nut or washer
11. 11.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
12. 12.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a longer string (d) a shorter string
13. 13.⚖️ 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
14. 14.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 26 seconds?
15. 15.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a balloon (d) a heavy nut or washer
16. 16.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we change it (c) we keep it the same
18. 18.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more fun (c) it is more accurate (d) 10 is a lucky number
19. 19.🧺 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 string
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.🛟 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
22. 22.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
23. 23.True or false: a magnet is needed for the pendulum. (a) True (b) False
24. 24.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 42 seconds?
25. 25.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it halves (d) it doubles
26. 26.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True
28. 28.⚖️ 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
29. 29.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 24 seconds?
30. 30.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
31. 31.⚖️ 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 string length (c) the weight of the bob
32. 32.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
33. 33.True or false: a mirror is not needed for the pendulum. (a) False (b) True
34. 34.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
35. 35.⚖️ 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
36. 36.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much slower (c) no, hardly at all (d) yes, much faster
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) yeast (d) a ruler
38. 38.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a grandfather clock (d) a phone
39. 39.True or false: yeast is not needed for the pendulum. (a) True (b) False
40. 40.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 45 seconds?

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