A vertical ideal spring is mounted on the floor and has a spring constant of 116 N/m. A 0.60-kg block is placed on the spring in two different ways. (a) In one case, the block is placed on the spring and not released until it rests stationary on the spring in its equilibrium position. Determine the amount (magnitude only) by which the spring is compressed. (b) In a second situation, the block is released from rest immediately after being placed on the spring and falls downward until it comes to a momentary halt. Determine the amount (magnitude only) by which the spring is now compressed.

a

b

Explanation:

From the question we are told that

   The spring constant is  

    The mass of the block is  

Considering question a

  Generally the weight of the block is mathematically represented as

=>    

=>  

Generally the force exerted on the spring is mathematically represented as

At equilibrium

=>    

=>    

=>    

Considering question b

  Generally the energy stored in the spring is mathematically represented as

Now the potential energy of the block before it  is drooped is mathematically represented as  

   Generally from the law of energy conservation we have that

=>  

=>  

=>  

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.

thermal energy is the answer