Answer:
Slowing down: A car decelerating because it's coming up to a red light.
Speeding up: A car accelerating because a red light has turned to a green light.
Moving at a constant speed, but changing direction: A car turning at a curve.
Moving at a constant velocity, with zero acceleration: A car on an empty highway.
Explanation:
Drive a car around or look at cars on the highway, you'll see the examples listed above happening all the time.
Velocity ratio is also defined as the ratio of a distance through which any part of a machine moves, to that which the driving part moves during the same time. An object has a mechanical advantage if it exerts a force higher than the velocity ratio.
Answer:
During total eclipse only Corona (Chromosphere) will be visible.
Explanation:
The outermost layer Corona is not visible during normal time. It is visible only when Moon hides the Sun, at that we can see the corona.