A1900 kg car slows down from a speed of 25m/s to a speed of 15m/s in 6.25s. how much work was done on the car

Explanation:

According to the work-energy theorem, the work done on the car is equal to its variation of kinetic energy:

where

m = 1900 kg is the mass of the car

vf = 15 m/s is the final speed

vi = 25 m/s is the initial speed

Substituting the data, we find

and the work is negative because it is done against the motion of the car (in fact, the car slows down, so it loses kinetic energy).

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.

i believe the answer is electric potential.

explanation: