As a protest against the umpire's calls, a baseball pitcher throws a ball straight up into the air at a speed of 17.3 m/s. in the process, he moves his hand through a distance of 1.43 m. the acceleration of gravity is 9.8 m/s 2 . if the ball has a mass of 0.196 kg, find the force he exerts on the ball to give it this upward speed. answer in units of n.

The force exerted on the ball to give it this speed is 18.6 N.

The given parameters;

The acceleration of the ball is calculated as;

The force exerted on the ball to give it this speed is calculated as;

Thus, the force exerted on the ball to give it this speed is 18.6 N.

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While still in his hand, for the ball to attain a speed of 17.3 m/s over 1.43 m would require that the throw takes

Then the (presumably constant) acceleration the pitcher applies to the ball is

The total acceleration acting on the ball is then

With a mass of , the force applied to the ball would be

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.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2