Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 54 · 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) a battery cell (b) a ruler (c) a heavy nut or washer (d) a stopwatch
2. 2.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) quicker (c) slower (d) stopped
3. 3.⚖️ 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
4. 4.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) yeast (c) a battery cell (d) a balloon
5. 5.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
6. 6.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the string (c) the wind (d) gravity
7. 7.True or false: a magnet is not needed for the pendulum. (a) True (b) False
8. 8.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a phone (d) a grandfather clock
9. 9.⚖️ 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
10. 10.⚖️ 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
11. 11.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) a ruler (d) yeast
12. 12.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) a string (d) a mirror
13. 13.⚖️ 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) the string length (d) the same hook
14. 14.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
15. 15.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
16. 16.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a balloon (c) a magnet (d) a ruler
17. 17.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much faster (c) yes, much slower (d) no, hardly at all
18. 18.🔮 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
19. 19.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 24 seconds?
20. 20.⚖️ 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
21. 21.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
22. 22.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
23. 23.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 48 seconds?
24. 24.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a string (c) turmeric powder (d) yeast
25. 25.True or false: a string is needed for the pendulum. (a) False (b) True
26. 26.🛟 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
27. 27.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) yeast (d) a pencil and tape
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) True (b) False
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
31. 31.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
32. 32.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is hot (d) it is wet
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) the string length (c) time for 10 swings
34. 34.⚖️ 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
35. 35.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 34 seconds?
36. 36.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
37. 37.⚖️ 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
38. 38.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
39. 39.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a longer string (c) a heavier bob (d) a shorter string
40. 40.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 30 seconds?

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