Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 705 · 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.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a pencil and tape (c) a string (d) a heavy nut or washer
2. 2.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
3. 3.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it doubles (c) it stays the same (d) it becomes 4 times
4. 4.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a sharp tool (d) a heavy brick
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a magnet (d) a pencil and tape
6. 6.🧺 Which of these is needed for the pendulum? (a) a magnet (b) turmeric powder (c) yeast (d) a string
7. 7.⚖️ 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
8. 8.⚖️ 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
9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) a stopwatch (d) a balloon
10. 10.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a grandfather clock (d) a digital watch
11. 11.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
12. 12.⚖️ 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 keep it the same (b) we change it (c) we measure it
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) time for 10 swings (c) how far we pull it back (d) the weight of the bob
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a mirror (c) a stopwatch (d) a pencil and tape
15. 15.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a battery cell (c) a ruler (d) a balloon
16. 16.True or false: a battery cell is needed for the pendulum. (a) True (b) False
17. 17.True or false: a string is not needed for the pendulum. (a) True (b) False
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
19. 19.⚖️ 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
20. 20.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
21. 21.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a balloon (d) a string
22. 22.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 57 seconds?
23. 23.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is wet (d) it is magnetic
24. 24.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) heavier (d) stopped
25. 25.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) True (b) False
27. 27.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
28. 28.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a shorter string (c) a lighter bob (d) a heavier bob
29. 29.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
30. 30.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
31. 31.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
32. 32.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) 10 is a lucky number (c) it is more accurate (d) one swing is too slow
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a string (d) a battery cell
34. 34.🧺 Which of these is not needed for the pendulum? (a) a string (b) a mirror (c) a stopwatch (d) a ruler
35. 35.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
36. 36.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 33 seconds?
37. 37.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
38. 38.⚖️ 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 measure it (c) we change it
39. 39.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
40. 40.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed

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