Equations of motion in one
dimensional motion
We know that a body in one
dimensional motion has displacement, velocity which is different at initial
level and final level and hence the body is also having some acceleration. The
body is covering some displacement in a specified time. Taking this into
consideration, we can obtain the relation between the above mentioned physical
quantities using the equations of motion. They relate some of the above
mentioned physical quantities and the relation is among the four quantities. If
we know any of the three, by using appropriate equation, we can find the
unknown physical quantity using the relations available to us.
Equation of motion for a freely falling body
A body starting from the state of
rest from a certain height and falling vertically downwards under the influence
of gravitational force is called as a freely falling body. For a freely falling
body, initial velocity is zero and the displacement of the body is nothing but
the height of fall in a given time. As the body falls down, its velocity
increases and hence it is under acceleration and it is due to gravitational
force. This acceleration due to the earth is called acceleration due to gravity
and it is constant at a given place. Taking this into consideration, we can
rewrite the equations of motion as shown in the video lecture below. The time
taken by the body to reach the ground from the maximum height is called time of
descent.
Related Posts
Distance and displacement comparison
Equations of Motion in One Dimension
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