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Tems11 [23]
3 years ago
5

A box falls out of a stationary helicopter hovering 135 m above the ground. How long will it take to hit the ground?

Physics
1 answer:
Marrrta [24]3 years ago
4 0

We have the equation of motion s = ut + \frac{1}{2} at^2, where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.

Here displacement = 135 m, Initial velocity = 0 m/s, acceleration = 9.81 m/s^2

Substituting

   135 = 0*t+\frac{1}{2} *9.8*t^2\\ \\ 4.9t^2 =135\\ \\ t =5.25 seconds

A box falls out of a stationary helicopter hovering 135 m above the ground will take 5.25 seconds to reach the ground.

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