Physics
Physics
Problem
The wheel of a railway carriage is 40 cm in diameter and makes 7 revolutions in a second, find the speed of train.Intuitive explanation
The key here is converting rotational motion to linear speed. Each complete revolution of the wheel covers a distance equal to its circumference—that's how far the train moves forward with each spin. Multiply the circumference by the number of revolutions per second, and you've got the train's speed in distance per time.
Intuitive explanation
The key here is converting rotational motion to linear speed. Each complete revolution of the wheel covers a distance equal to its circumference—that's how far the train moves forward with each spin. Multiply the circumference by the number of revolutions per second, and you've got the train's speed in distance per time.