Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 267 · 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.⚖️ 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
2. 2.⚖️ 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
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we change it (c) we measure it
4. 4.🧺 Which of these is needed for the pendulum? (a) a mirror (b) turmeric powder (c) a pencil and tape (d) a battery cell
5. 5.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) stopped (c) slower (d) heavier
6. 6.True or false: yeast is needed for the pendulum. (a) False (b) True
7. 7.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much faster (c) yes, much slower (d) no, hardly at all
8. 8.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 54 seconds?
9. 9.🔮 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
10. 10.⚖️ 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
11. 11.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
12. 12.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a small nut or washer (d) a glass bottle
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 weight of the bob (b) the same hook (c) how far we pull it back (d) the string length
14. 14.⚖️ 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
15. 15.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
16. 16.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
17. 17.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) yeast (d) a stopwatch
18. 18.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a heavier bob (d) a lighter bob
19. 19.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
20. 20.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) one swing is too slow (c) it is more accurate (d) it is more fun
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a balloon (c) a stopwatch (d) a pencil and tape
22. 22.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
23. 23.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) much faster (d) it cannot swing
24. 24.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a pencil and tape (c) yeast (d) a ruler
25. 25.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a grandfather clock (d) a digital watch
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a battery cell (d) a ruler
27. 27.⚖️ 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 measure it (b) we keep it the same (c) we change it
28. 28.True or false: a string is needed for the pendulum. (a) False (b) True
29. 29.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 18 seconds?
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) the string length (c) the same hook
31. 31.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
32. 32.🛟 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
33. 33.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
34. 34.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
35. 35.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 17 seconds?
36. 36.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
37. 37.📘 What pulls the pendulum bob back down after each swing? (a) gravity (b) magnetism (c) the string (d) the wind
38. 38.⚖️ 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) True (b) False
39. 39.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 16 seconds?
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) a string (d) a magnet

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