Matthew throws a ball straight up in the air it rises for a period time then it begins to drop at which point in the balls journey will gravity be greatest force acting on the ball?

The greatest force of gravity on the ball will occur at the point when the ball is near to hit the ground.

As we know that the earth's center attracts everything towards its center with an acceleration of 9.8 m/s² so it simply means that the change in velocity must occur to produce acceleration. When the ball comes towards the earth, its speed contineously increases and it is at maximum level when it is about to hit the ground so this is the point where gravitational force is maximum.

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.