Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 990 · 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.True or false: a balloon is not needed for the pendulum. (a) False (b) True
2. 2.⚖️ 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) True (b) False
3. 3.⚖️ 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
4. 4.True or false: a balloon is needed for the pendulum. (a) False (b) True
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a heavy nut or washer (c) a string (d) a pencil and tape
6. 6.🧺 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 pencil and tape (d) a string
7. 7.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it becomes 4 times (d) it doubles
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a stopwatch (c) a heavy nut or washer (d) a pencil and tape
9. 9.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) it is magnetic (d) the bob could hit you
10. 10.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) quicker (c) stopped (d) slower
11. 11.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much slower (c) it stops swinging (d) yes, much faster
12. 12.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) turmeric powder (d) a heavy nut or washer
13. 13.⚖️ 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) how far we pull it back (c) the string length (d) the same hook
14. 14.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
15. 15.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
16. 16.True or false: a mirror is not needed for the pendulum. (a) False (b) True
17. 17.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) much faster (c) it cannot swing (d) about the same
18. 18.⚖️ 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
19. 19.True or false: a ruler is not needed for the pendulum. (a) True (b) False
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a ruler (c) a pencil and tape (d) a stopwatch
21. 21.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) the wind (c) the string (d) magnetism
22. 22.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) False (b) True
24. 24.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a heavy brick (d) a sharp tool
25. 25.⚖️ 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 same hook
26. 26.True or false: a string is not needed for the pendulum. (a) False (b) True
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) the weight of the bob (c) the string length (d) the same hook
28. 28.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
29. 29.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a pencil and tape (c) a stopwatch (d) a heavy nut or washer
30. 30.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 48 seconds?
31. 31.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a grandfather clock (c) a digital watch (d) a sundial
32. 32.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a shorter string (c) a longer string (d) a heavier bob
33. 33.🧺 Which of these is not needed for the pendulum? (a) a string (b) a magnet (c) a stopwatch (d) a ruler
34. 34.⚖️ 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
35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) False (b) True
36. 36.⚖️ 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
37. 37.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
38. 38.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
39. 39.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
40. 40.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed

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