Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 42 · 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.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
2. 2.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) how far we pull it back (c) time for 10 swings
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) turmeric powder (d) a ruler
5. 5.🛟 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
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) the weight of the bob (c) the same hook (d) time for 10 swings
7. 7.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
8. 8.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a stopwatch (d) a battery cell
9. 9.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
10. 10.⚖️ 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
11. 11.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a string (c) turmeric powder (d) a mirror
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we measure it (c) we keep it the same
13. 13.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
14. 14.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
15. 15.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
16. 16.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
17. 17.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the wind (d) the string
18. 18.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
19. 19.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) False (b) True
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a heavy nut or washer (d) a battery cell
21. 21.⚖️ 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
22. 22.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a balloon (c) a string (d) a heavy nut or washer
23. 23.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
24. 24.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 54 seconds?
25. 25.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a stopwatch (c) turmeric powder (d) a heavy nut or washer
26. 26.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) how far we pull it back (b) the string length (c) the weight of the bob (d) the same hook
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is the one thing we change. (a) True (b) False
29. 29.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) quicker (d) slower
30. 30.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
31. 31.True or false: a mirror is not needed for the pendulum. (a) False (b) True
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a balloon (d) a string
33. 33.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 20 seconds?
34. 34.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a small nut or washer (c) a glass bottle (d) a sharp tool
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a mirror (c) a string (d) a stopwatch
36. 36.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 4 seconds?
37. 37.True or false: a balloon is not needed for the pendulum. (a) False (b) True
38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we measure it (c) we keep it the same
39. 39.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a stopwatch (c) a string (d) yeast
40. 40.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a grandfather clock (c) a digital watch (d) a phone

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