Ajet airliner moving initially at 852 mph
(with respect to the ground) to the east moves
into a region where the wind is blowing at
206 mph in a direction 55° north of east.
what is the new speed of the aircraft with
respect to the ground?
answer in units of mph.

984.8 mph

Explanation:

The initial velocity of the jet in terms of components is

where we took east as positive x-direction and north as positive y-direction.

The velocity of the wind is

So, the resultant velocity of the jet considering also the wind is

And so the new speed of the jet is

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )

a is the best answer your welcome