Question

stone is dropped from a top of a building and it takes 3 second to reach the ground.The height of the building from the ground in metres will be​

Answer 1

To Find :

• height of building from ground.

Solution :

• Time = 3 second
• Acceleration due to gravity = 10m/s²
• Initial velocity = 0

By using Equation of motion

$\boxed{\underline{\red{\rm{s=ut+ \frac{1}{2}at^{2}}}}}$

where,

• s = Distance
• u = initial velocity
• t = time
• a = acceleration

›› s = 0 × 3 + 1/2 × 10 × 3²

›› s = 0 + 5 × 9

›› s = 45 m

Hence

• Height of building from ground is 45m

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