Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 762 · 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 not needed for the pendulum. (a) True (b) False
2. 2.🕰️ 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
3. 3.🛟 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
4. 4.🛟 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
5. 5.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) stopped (c) slower (d) heavier
6. 6.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a longer string (d) a lighter bob
7. 7.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
8. 8.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) it stops swinging (c) yes, much faster (d) no, hardly at all
9. 9.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
10. 10.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
11. 11.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) about the same (d) it cannot swing
12. 12.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a digital watch (c) a sundial (d) a phone
13. 13.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
14. 14.⚖️ 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 same hook
15. 15.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 7 seconds?
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a string (d) yeast
17. 17.⚖️ 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
18. 18.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
19. 19.🧺 Which of these is needed for the pendulum? (a) yeast (b) a mirror (c) turmeric powder (d) a pencil and tape
20. 20.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the same hook (b) the string length (c) how far we pull it back (d) the weight of the bob
22. 22.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) turmeric powder (d) a heavy nut or washer
23. 23.True or false: yeast is not needed for the pendulum. (a) False (b) True
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) True (b) False
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a heavy nut or washer (d) a mirror
26. 26.⚖️ 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
27. 27.True or false: a magnet is needed for the pendulum. (a) True (b) False
28. 28.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “how far we pull it back”? (a) we change it (b) we measure it (c) we keep it the same
30. 30.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 10 seconds?
31. 31.⚖️ 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
32. 32.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 13 seconds?
33. 33.⚖️ 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) True (b) False
34. 34.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
35. 35.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 20 seconds?
36. 36.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a pencil and tape (d) a magnet
37. 37.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
38. 38.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a battery cell (c) a string (d) yeast
39. 39.🔮 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 becomes 4 times (d) it doubles
40. 40.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?

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