In a newly proposed system of units, the acceleration due to gravity at the Earth's surface ( g ) is taken as 1 unit/s^2 . If a small heavy particle is dropped from rest from a tall building and takes exactly 4 s to hit

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Correct answer: B. 8

In the new system of units, the acceleration due to gravity is

g = 1\text{ unit/s}^2

.

The initial velocity of the dropped particle,

u = 0

.

Time taken to fall,

t = 4\text{ s}

.

Using the second equation of motion for the displacement (height of the building):

h = ut + \dfrac{1}{2}gt^2

h = 0 + \dfrac{1}{2}(1)(4)^2

h = \dfrac{1}{2} \times 16 = 8\text{ new units}

.

Answer:

8

In a newly proposed system of units, the acceleration due to...

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