Q.

From the top of a 64 meters high tower a stone is thrown upwards vertically with a velocity of 48 m/s. The greatest height (in meters) attained by the stone assuming the value of gravitational acceleration g=32ms-2

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a

100

b

88

c

128

d

118

answer is A.

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Detailed Solution

We are using the formula right here. v2-u2=2as Keeping in mind that at the highest speed,v=0. then ascertain the tower's height.

Let u be the stone's starting velocity, v its ultimate velocity, an its acceleration caused by gravity, s its displacement, and h its highest point.

Think of a stone falling at a certain speed of 48ms-1 from a building that is 64 meters high. .

We need to find the greatest height attained by the stone, assuming g=32ms-2.

As the stone is falling down g=-32ms-2.

WKT, according to kinematic equations:

v2=u2+2as

Where, v is final velocity and u is initial velocity.

Here, ⁣v=0 u=48ms-1 a=g=-32ms-2

Substituting the values we get,

0=482+2×-32×s  0=2304-64s  64s=2304  s=230464=36m

Thus, the greatest height would be, 64+36=100m

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