Examples of uniformly accelerated motion?
Examples of uniformly accelerated motion:
Slowing down to a stop at a red light.
Speeding up after a red light.
When an object undergoes one-dimensional uniformly accelerated motion, its instantaneous velocity increases linearly with time. If it is assumed that the initial velocity of the object is zero at time t = 0, then its instantaneous velocity v at any later time t is given by v = at (1) where a is the acceleration, which is constant in magnitude and direction.
A rectilinear motion is a motion along a straight line. It can be one, two, or three dimensional. Non-accelerated motion is when a body is in motion, but there isn't a force to speed it up or slow it down. Therefore, non-accelerated rectilinear motion would be a motion along a straight line that has no force trying to speed it up or slow it down.
How could the uniformly accelerated motion be modified to study the acceleration of a freely-falling body?
At short distances - up to a few kilometers - gravity can be considered constant, and therefore, a body in free fall (i.e., neglecting other forces, such as air resistance) will be uniformly accelerated. Over longer distances, the force of gravity is no longer the same; this will have to be considered for the "modification" (for example, less force = less acceleration). Close to the Earth's surface, in practice, air resistance has to be considered…
2 conditions for uniform motion: a) constant speed; b) constant direction (no turning). If either of these conditions isn't there, then the motion is "non-uniform" or "accelerated". Examples of uniform motion: a car in a drag race reaching and maintaining its maximum speed on a straight and flat race course; a space craft drifting between two galaxies; (very few real-life examples). Examples of non-uniform motion: a racing horse; merry-go-around; swing; automotive braking; throwing a softball…
It is either accelerated or decelerated. If accelerated then there will be an increase in velocity as time passes. If decelerated then velocity goes on decreasing. If acceleration is normal to motion then change in direction of motion and so curvilinear motion takes place. All these come under the change of the state of motion