A 20-N Crate Starting at Rest Slides Down a Rough

Multiple Choice

A 20-N crate starting at rest slides down a rough 5.0-m long ramp,inclined at 25° with the horizontal.30 J of energy is lost to friction.What will be the speed of the crate at the bottom of the incline?

A) 0.98 m/s
B) 2.1 m/s
C) 3.5 m/s
D) 4.7 m/s