Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 503 · 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.🧺 Which of these is needed for the pendulum? (a) yeast (b) a battery cell (c) a pencil and tape (d) a mirror
2. 2.🕰️ 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) it is more fun (d) one swing is too slow
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a string (d) yeast
4. 4.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
5. 5.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) it stops swinging (c) yes, much slower (d) yes, much faster
6. 6.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a phone (c) a digital watch (d) a grandfather clock
7. 7.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is magnetic (d) it is wet
8. 8.🧺 Which of these is needed for the pendulum? (a) a string (b) turmeric powder (c) a balloon (d) a magnet
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
10. 10.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) gravity (c) the wind (d) the string
11. 11.⚖️ 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) False (b) True
12. 12.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
13. 13.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
14. 14.🧺 Which of these is needed for the pendulum? (a) a ruler (b) a magnet (c) a balloon (d) a mirror
15. 15.⚖️ 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
16. 16.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
17. 17.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
18. 18.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
19. 19.⚖️ 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 weight of the bob (c) the same hook (d) time for 10 swings
20. 20.True or false: a ruler is not needed for the pendulum. (a) False (b) True
21. 21.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
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.🔮 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
24. 24.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it doubles (d) it halves
25. 25.⚖️ 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
26. 26.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
27. 27.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a longer string (d) a shorter string
28. 28.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
29. 29.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a sharp tool (d) a small nut or washer
30. 30.⚖️ 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 weight of the bob (c) the string length (d) the same hook
31. 31.True or false: a ruler is needed for the pendulum. (a) False (b) True
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a stopwatch (c) a pencil and tape (d) a ruler
33. 33.⚖️ 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 weight of the bob
34. 34.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 17 seconds?
35. 35.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a stopwatch (c) a pencil and tape (d) a string
37. 37.⚖️ 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
38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we keep it the same (c) we measure it
39. 39.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 18 seconds?
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True

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