A 82-kg skydiver has a speed of 40 m/s at an altitude of 490 m above the ground. Calculate the total mechanical energy of the skydiver.

Explanation:

Mechanical Energy=Potential Energy+ kinetic Energy

To calculate Kinetic Energy:-

To calculate Potential Energy:-

therefore,

The skydiver's total mechanical energy is 459365J

the bal will not change its velocity.

= initial pressure

= final pressure = 2

= initial volume

= final volume = /4

= initial temperature = 20 c = 20 + 273 = 293 k

= final temperature = ?

using the equation