If the sled is also being acted on by a constant kinetic friction force of 260 N and it started from rest, what is the final speed of the sled

Complete Question

The complete question is shown on the first uploaded image

a

b

Explanation:

From the question we are said that

        The  mass of the shed is  

        The pulling  force is  

        The  angle is  

        The  distance covered is  

        The kinetic force is  

Generally the work done is mathematically represented as

=>        

=>          

Generally according to the work-energy  theorem

Here   is total work done which is mathematically represented as

=>    

=>    

  Also    is the change in kinetic energy which is mathematically represented as

Here u  is the initial velocity of the shed when at rest

=>      

So

=>        

=>        

d. air pressure decreases as altitude increases.

neither accurate nor precise.