State newton’s law of gravition.Distinguish between acceleration and velocity.
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Answers
Answer:
Every object in the universe exert gravitational pull to other objects. When the gravitational pull is exerted by Earth it is call Gravity. So gravity is the pull by earth. Whereas acceleration due to gravity is acceleration by which any object cmes towards the earth within its gravitational field.
Explanation:
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Newton's law of universal gravitation states that every particle attracts every other particle in the universe with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
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In detail:
Acceleration and Velocity
Acceleration:
Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity. An object is accelerating if it is changing its velocity. As velocity is an example of vector, it has direction and magnitude. So we can explain the acceleration in any of these three ways:
a change in direction (from East to North-East)
a change in both speed and direction (from 34 km/h East to 12 km/h West)
a change in speed, the magnitude of the velocity (from 34 km/h to 67 km/h)
Below is the table of related articles explaining acceleration and velocity:
Angular Acceleration Uniformly Accelerated Motion – Constant Acceleration
Instantaneous Speed and Instantaneous Velocity Relative velocity in two dimensions
Newton’s second law of motion:
The acceleration of an object is directly proportional to the force acting on it and inversely proportional to its mass.
Simply put, the force causes an object to accelerate, while the object’s mass resists acceleration.
Velocity:
The amount of motion normalized to time is defined to be the velocity of the object. It is thus the displacement of the object divided by the time required to make the displacement. [The object in Tissue Tracking Echocardiography (TTE) is mainly a single point or a Region of Interest (ROI).] Hence, its unit is cm/s.
Velocity is used to describe how fast the myocardium moves in a particular direction. During systole myocardium travels towards apex and velocities are positive in nature. During diastole heart muscle moves to its initial position and diastolic velocities are negative. Displacement is the measure defining how far a myocardial segment moves from an initial point. In fetal echocardiogram, its unit is mm and indicated positively.
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