A 125-Kg Crate Slides Along a Horizontal Frictionless Surface at a a Constant

Multiple Choice

A 12.5-kg crate slides along a horizontal frictionless surface at a constant speed of 4.0 m/s. The crate then slides down a frictionless incline and across a second horizontal surface as shown in the figure.
-What is the kinetic energy of the crate as it slides on the upper surface?

A) 30 J
B) 80 J
C) 100 J
D) 200 J
E) 490 J