Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 813 · 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.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is magnetic (d) it is hot
2. 2.🧺 Which of these is needed for the pendulum? (a) a balloon (b) turmeric powder (c) a mirror (d) a pencil and tape
3. 3.⚖️ 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
4. 4.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a glass bottle (d) a small nut or washer
5. 5.🧺 Which of these is needed for the pendulum? (a) a balloon (b) turmeric powder (c) a stopwatch (d) a battery cell
6. 6.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it stays the same (c) it doubles (d) it becomes 4 times
7. 7.⚖️ 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
8. 8.⚖️ 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
9. 9.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a stopwatch (c) a heavy nut or washer (d) a string
10. 10.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
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.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much slower (c) no, hardly at all (d) yes, much faster
13. 13.⚖️ 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 weight of the bob (c) the same hook (d) time for 10 swings
14. 14.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 13 seconds?
15. 15.True or false: yeast is needed for the pendulum. (a) True (b) False
16. 16.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a longer string (d) a shorter string
17. 17.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
18. 18.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) it is more fun (c) it is more accurate (d) one swing is too slow
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a magnet (c) a stopwatch (d) a ruler
20. 20.⚖️ 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
21. 21.⚖️ 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
22. 22.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
23. 23.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a stopwatch (c) yeast (d) a string
24. 24.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
25. 25.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
26. 26.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) True (b) False
28. 28.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
29. 29.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
30. 30.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
31. 31.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) quicker (d) stopped
32. 32.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a phone (d) a grandfather clock
33. 33.🧺 Which of these is needed for the pendulum? (a) a string (b) a battery cell (c) turmeric powder (d) a mirror
34. 34.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
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.⚖️ 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
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a battery cell (c) a stopwatch (d) a pencil and tape
38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
39. 39.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) magnetism (c) gravity (d) the wind
40. 40.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?

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