Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 953 · 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.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
2. 2.⚖️ 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
3. 3.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
4. 4.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a lighter bob (d) a longer string
5. 5.🧺 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 string (d) a magnet
6. 6.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
7. 7.⚖️ 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
8. 8.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
9. 9.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we change it (c) we measure it
11. 11.🔮 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 doubles (d) it halves
12. 12.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a battery cell (c) turmeric powder (d) a heavy nut or washer
13. 13.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) quicker (d) heavier
14. 14.⚖️ 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
15. 15.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
16. 16.🔮 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
17. 17.True or false: yeast is not needed for the pendulum. (a) True (b) False
18. 18.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a heavy brick (d) a small nut or washer
19. 19.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) a battery cell (d) a heavy nut or washer
20. 20.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
21. 21.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
22. 22.⚖️ 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
23. 23.🛟 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
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) a pencil and tape (d) a battery cell
25. 25.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a grandfather clock (d) a phone
26. 26.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
27. 27.⚖️ 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 same hook (c) the string length
28. 28.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
29. 29.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a string (c) turmeric powder (d) a pencil and tape
30. 30.⚖️ 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
31. 31.⚖️ 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) the weight of the bob (c) how far we pull it back (d) the string length
32. 32.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
33. 33.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more fun (c) one swing is too slow (d) it is more accurate
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a pencil and tape (c) a ruler (d) a stopwatch
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) turmeric powder (d) a heavy nut or washer
36. 36.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a string (c) a heavy nut or washer (d) a stopwatch
37. 37.⚖️ 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) False (b) True
38. 38.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) no, hardly at all (c) yes, much slower (d) yes, much faster
39. 39.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
40. 40.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a balloon (d) a string

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