A block slides on a rough horizontal surface from point A to point B.A force (magnitude P = 2.0 N)acts on the block between A and B,as shown.Points A and B are 1.5 m apart.If the kinetic energies of the block at A and B are 5.0 J and 4.0 J,respectively,how much work is done on the block by the force of friction as the block moves from A to B?
A)−3.3 J
B)+1.3 J
C)+3.3 J
D)−1.3 J
E)+4.6 J

Question

A block slides on a rough horizontal surface from point A to point B.A force (magnitude P = 2.0 N)acts on the block between A and B,as shown.Points A and B are 1.5 m apart.If the kinetic energies of the block at A and B are 5.0 J and 4.0 J,respectively,how much work is done on the block by the force of friction as the block moves from A to B? 
A)−3.3 J 
B)+1.3 J 
C)+3.3 J 
D)−1.3 J 
E)+4.6 J

Quizplus · Accepted Answer

The Answer of A block slides on a rough horizontal surface from point A to point B.A force (magnitude P = 2.0 N)acts on the block between A and B,as shown.Points A and B are 1.5 m apart.If the kinetic energies of the block at A and B are 5.0 J and 4.0 J,respectively,how much work is done on the block by the force of friction as the block moves from A to B? 
A)−3.3 J 
B)+1.3 J 
C)+3.3 J 
D)−1.3 J 
E)+4.6 J

A Block Slides on a Rough Horizontal Surface from Point