Here acceleration will be acceleration due to gravity. So equations of motion for uniformly accelerated motion can be used which are Motion under gravity is a uniformly accelerated motion. Motion under gravity means an object is in motion in space under the force of gravity alone. Motion of body is called free fall if only force acting on it is gravity (i.e. If a body moves with uniform velocity, its acceleration is zero i.e. If a body comes to rest, its final velocity v = 0 or, if a body reached the highest point after being thrown upwards its final velocity v = 0 but has acceleration (acting). If a body starts from rest its initial velocity u = 0. If a body is dropped from a height then its initial velocity u = 0 but has acceleration (acting). The distance covered by the body in nth second will be. [distance covered by a body along a straight line in n second. S = ut + 1/2 at 2 is the distance covered by a body in t s. Putting this value of ‘t’ in equation …(i) Distance traveled = Average velocity × timeįrom the second equation of motion we have, The distance traveled by moving body in time ‘t’ is ‘S’ then the average velocity = (v + u)/2. Suppose a body has an initial velocity ‘u’ and uniform acceleration ‘a’ for time ‘t’ so that its final velocity becomes ‘v’. This equation is known as the first equation of motion. Suppose it is subjected to a uniform acceleration ‘a’ so that after time ‘t’ its final velocity becomes ‘v’. Third Equation of motion : v 2 - u 2 = 2asĬonsider a body having initial velocity ‘u’.Second Equation of motion : s = ut + 1/2at 2. These equations are called equations of motion. When the body is moving along a straight line with uniform acceleration, a relation can be established between velocity of the body, acceleration of the body and the distance travelled by the body in a specific time by a set of equations.
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