Question

What is acceleration due to gravity? Derive an expression for it on the
surface of earth. A free falling object reaches the earth surface in 4second.
Calculate the height from which it was dropped and velocity of the object
just before touching the ground,
or​

Answer 1

Answer:

Explanation: Acceleration due to gravity is the acceleration gained by any object due to gravitational fore is called acceleration due to gravity. Its value is $9.8m/s^{2}$  since it was dropped initial velocity (u) = 0, and time taken is given so t = 4s and since acceleration in this case is acceleration due to gravity a =

so v = 39.2m/s

using s= ut + 1/2 $at^{2}$ so s= (0)(4) + 1/2(9.8)x$(4)^{2}$ so s = 0 + 4.9 x 8

so s = 39.2m

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