Ajet is travelling at a speed of 1200 km/h and drops cargo from a height of 2.5 km above the ground calculate the time it takes for the cargo to hit the ground and the range it travels

a) Time of flight: 22.6 s

To calculate the time it takes for the cargo to reach the ground, we just consider the vertical motion of the cargo.

The vertical position at time t is given by

where

h = 2.5 km = 2500 m is the initial height

is the initial vertical velocity of the cargo

g = 9.8 m/s^2 is the acceleration of gravity

The cargo reaches the ground when

So substituting it into the equation and solving for t, we find the time of flight of the cargo:

b) 7.5 km

The range travelled by the cargo can be calculated by considering its horizontal motion only. In fact, the horizontal motion is a uniform motion, with constant velocity equal to the initial velocity of the jet:

So the horizontal distance travelled is

And if we substitute the time of flight,

t = 22.6 s

We find the range of the cargo:

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explanation: