Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 606 · 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 takes 1 second for one swing. How many swings does it make in 10 seconds?
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we change it (c) we keep it the same
3. 3.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a magnet (c) a heavy nut or washer (d) a pencil and tape
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a heavy nut or washer (c) a string (d) a ruler
6. 6.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the string (d) the wind
7. 7.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
8. 8.⚖️ 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
9. 9.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
10. 10.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a small nut or washer (d) a sharp tool
11. 11.⚖️ 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
12. 12.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 26 seconds?
13. 13.⚖️ 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 keep it the same (c) we measure it
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a heavy nut or washer (d) yeast
15. 15.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a longer string (d) a lighter bob
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a balloon (d) a heavy nut or washer
17. 17.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a stopwatch (c) a magnet (d) a string
18. 18.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a phone (d) a grandfather clock
19. 19.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) quicker (d) heavier
20. 20.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
21. 21.True or false: a string is needed for the pendulum. (a) False (b) True
22. 22.⚖️ 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) False (b) True
23. 23.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
24. 24.⚖️ 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 same hook (c) the string length (d) time for 10 swings
25. 25.True or false: a mirror is needed for the pendulum. (a) False (b) True
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a heavy nut or washer (d) a mirror
27. 27.True or false: a string is not needed for the pendulum. (a) False (b) True
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we measure it (c) we change it
29. 29.⚖️ 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
30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a heavy nut or washer (d) turmeric powder
31. 31.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
32. 32.🔮 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
33. 33.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
34. 34.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) the bob could hit you (d) it is wet
35. 35.🧺 Which of these is needed for the pendulum? (a) a magnet (b) turmeric powder (c) a ruler (d) a battery cell
36. 36.⚖️ 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
37. 37.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
38. 38.True or false: a balloon is not needed for the pendulum. (a) True (b) False
39. 39.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
40. 40.⚖️ 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 change it (c) we measure it

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