Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 63 · 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 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
2. 2.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a phone (c) a sundial (d) a grandfather clock
3. 3.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
4. 4.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a stopwatch (c) a string (d) a balloon
5. 5.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it halves (c) it doubles (d) it stays the same
6. 6.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a magnet (c) a pencil and tape (d) a mirror
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a pencil and tape (c) a ruler (d) a string
8. 8.⚖️ 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 string length (c) the same hook (d) time for 10 swings
9. 9.⚖️ 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 keep it the same (c) we measure it
10. 10.True or false: a balloon is not needed for the pendulum. (a) True (b) False
11. 11.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a lighter bob (c) a longer string (d) a heavier bob
12. 12.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
13. 13.🛟 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
14. 14.⚖️ 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
15. 15.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
16. 16.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) yeast (c) a stopwatch (d) a balloon
17. 17.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
18. 18.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
19. 19.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a string (c) yeast (d) a magnet
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we change it (c) we measure it
21. 21.⚖️ 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 change it (c) we keep it the same
22. 22.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is wet (d) it is magnetic
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) yeast (d) a pencil and tape
24. 24.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) stopped (d) heavier
25. 25.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
26. 26.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a ruler (c) a heavy nut or washer (d) turmeric powder
27. 27.True or false: a string is needed for the pendulum. (a) False (b) True
28. 28.⚖️ 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
29. 29.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 14 seconds?
30. 30.⚖️ 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
31. 31.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more accurate (c) one swing is too slow (d) it is more fun
32. 32.True or false: yeast is needed for the pendulum. (a) False (b) True
33. 33.True or false: a string is not needed for the pendulum. (a) True (b) False
34. 34.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 14 seconds?
35. 35.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
36. 36.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) the string (c) magnetism (d) gravity
37. 37.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
38. 38.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much slower (c) yes, much faster (d) no, hardly at all
39. 39.⚖️ 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) the same hook (c) time for 10 swings (d) the weight of the bob
40. 40.True or false: a balloon is needed for the pendulum. (a) False (b) True

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