4.76 A car starts from rest on a curve of radius 120 m and accelerates tangentially at 1.0 m/s2 . Through what angle will the car have traveled when the magnitude of its total acceleration is 2.0 m/s2

The angle is 28.64°

Explanation:

Given:

Radius of curve m

Tangential acceleration

Total acceleration

From equation total acceleration,

Find centripetal acceleration,

From equation of centripetal acceleration,

From the equation of kinematics,

    m

For finding the angle,

     rad

    28.64°

Therefore, the angle is 28.64°

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.

ok

explanation: