A box rests on the (frictionless) bed of a truck. The truck driver starts the truck and accelerates forward. The box!

immediately starts to slide toward the rear of the truck

bed. Discuss the motion of the box, in terms of Newton's

laws, as seen (a) by Mary standing on the ground beside

the truck, and (b) by Chris who is riding on the truck

(Fig. 4–35).

follows are the solution to the given point:

Explanation:

In point A:

The meet is next to the truck on the floor, and for Mary, its box is fixed wrt. Since no power occurs, no speed is going to be happening. So, Mary's box seems to be at rest.

In point B:

Chris and as well as the box ride mostly on the truck because the truck was accelerating, it has been said that Chris will be in a non-inert position mostly on the truck. For Chris, its box is thrown backward as well as the box is moved because of another force.

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.

this would be about 43%