A Boy Releases His 2

Multiple Choice

A boy releases his 2.0 kg toy, from rest, at the top of a sliding-pond inclined at 20° above the horizontal. What will the toy's speed be after sliding 4.0 m along the sliding-pond? The coefficient of kinetic friction is 0.20.

A) 3.0 m/s
B) 2.2 m/s
C) 5.2 m/s
D) 4.4 m/s
E) 3.5 m/s