Question: u did it wrong A 4 - k g block moves down a rough 3 7 incline a distance of 5 m from point A

u did it wrong
A 4-kg block moves down a rough 37 incline a distance of 5 m from point A to point B . As shown in the figure below, a horizontal force of magnitude F=10N is applied to the block between these two points. The kinetic energy of the block at point A is 10 J and the kinetic energy of the block at point B is 20 J . What is the increase in internal energy of the block-incline-Earth system due to friction?
M=4kg
F2=10N
KEA=105
kEB=205
A.40 J
B.80 J
C.60 J
D.50 J
E.70 J
Ans: E
u did it wrong A 4 - k g block moves down a rough

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