Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 806 · 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.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) the weight of the bob (c) how far we pull it back (d) the string length
3. 3.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a longer string (d) a lighter bob
4. 4.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
5. 5.⚖️ 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) time for 10 swings (c) the same hook (d) the string length
6. 6.True or false: a string is needed for the pendulum. (a) False (b) True
7. 7.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a grandfather clock (c) a digital watch (d) a phone
8. 8.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
9. 9.🔮 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 doubles (d) it halves
10. 10.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a ruler (d) a mirror
11. 11.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) the wind (c) magnetism (d) gravity
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we measure it (c) we change it
14. 14.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a stopwatch (c) a balloon (d) turmeric powder
15. 15.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a pencil and tape (d) turmeric powder
17. 17.🛟 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
18. 18.⚖️ 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) time for 10 swings (c) the string length
19. 19.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
20. 20.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much faster (c) yes, much slower (d) it stops swinging
21. 21.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) True (b) False
23. 23.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) one swing is too slow (c) it is more accurate (d) it is more fun
24. 24.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a magnet (c) a ruler (d) a pencil and tape
26. 26.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) yeast (c) a stopwatch (d) a pencil and tape
27. 27.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a balloon (c) a mirror (d) a pencil and tape
28. 28.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a ruler (c) a magnet (d) yeast
29. 29.True or false: a ruler is needed for the pendulum. (a) False (b) True
30. 30.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) stopped (d) quicker
31. 31.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) about the same (c) much slower (d) it cannot swing
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a ruler (d) a battery cell
33. 33.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
34. 34.🛟 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
35. 35.⚖️ 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
36. 36.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a heavy nut or washer (d) a balloon
38. 38.True or false: a magnet is needed for the pendulum. (a) False (b) True
39. 39.⚖️ 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
40. 40.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) turmeric powder (c) a magnet (d) a heavy nut or washer

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