A student of mass 45kg, who is undergoing National Service training, takes 6s to climb a flight of stairs that had 36 steps. If each step is 16cm high, what is the power of the student?

Approximately on average in the vertical direction (assuming that .)

Explanation:

Vertical displacement of this student in : .

Average vertical velocity of this student: .

The average vertical force that this student exerts on the ground would be equal to the weight of this student:

.

The average power of this student in the vertical direction is equal to the product of the force and velocity of this student in that direction:

.

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.

not too sure thinking all accelerations are pointed down