A 100 kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 200 N. For the first 15 m the floor is frictionless and for the next 15 m the coefficient of friction is 0.15. *

What is the final speed of the crate?

A. 8.72 m/s

B. 4.23 m/s

C. 9.12 m/s

D. 2.31 m/s

 

 

 

A 46.0 kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 235 N. For the first 10.0 m the floor is frictionless, and for the next 10.0 m the coefficient of friction is 0.18. What is the final speed of the crate after being pulled these 20.0 m?

A 150- crate, starting from rest, is pulled across a floor with a constant horizontal force of 420 . For the first 13 the floor is frictionless, and for the next 13 the coefficient of friction is 0.35.

A 130-kg crate, starting from rest, is pulled across a floorwith a constant horizontal force of 410 N. For the first 20 m thefloor is frictionless, and for the next 20 m the coefficient offriction is 0.27.


What is the final speed of the crate?