Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 865 · 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 battery cell is needed for the pendulum. (a) True (b) False
2. 2.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 11 seconds?
3. 3.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a sharp tool (d) a small nut or washer
4. 4.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) heavier (d) stopped
5. 5.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
6. 6.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) the bob could hit you (d) it is magnetic
7. 7.🧺 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 magnet
8. 8.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
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 mirror (d) a stopwatch
10. 10.🧺 Which of these is needed for the pendulum? (a) a magnet (b) turmeric powder (c) a pencil and tape (d) a balloon
11. 11.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) time for 10 swings (c) the weight of the bob (d) the string length
13. 13.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) the wind (d) gravity
14. 14.⚖️ 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 same hook (c) how far we pull it back (d) the string length
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the same hook
16. 16.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) much faster (d) it cannot swing
17. 17.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) a string (d) a magnet
18. 18.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
19. 19.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
20. 20.🔮 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
21. 21.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 39 seconds?
22. 22.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
23. 23.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a digital watch (c) a phone (d) a sundial
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a pencil and tape (d) a balloon
25. 25.⚖️ 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 measure it (b) we keep it the same (c) we change it
26. 26.⚖️ 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
27. 27.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a lighter bob (c) a heavier bob (d) a shorter string
28. 28.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
29. 29.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
30. 30.⚖️ 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 change it (c) we keep it the same
31. 31.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much faster (c) it stops swinging (d) yes, much slower
32. 32.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) a battery cell (d) a ruler
33. 33.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
34. 34.⚖️ 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) how far we pull it back (c) the string length
35. 35.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more accurate (c) 10 is a lucky number (d) it is more fun
36. 36.⚖️ 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) True (b) False
37. 37.⚖️ 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 keep it the same (c) we measure it
38. 38.⚖️ 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
39. 39.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
40. 40.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed

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