A46-kg box is being pushed a distance of 7.5 m across the floor by a force whose magnitude is 191 n. the force is parallel to the displacement of the box. the coefficient of kinetic friction is 0.20. determine the work done on the box by each of the four forces that act on the box. be sure to include the proper plus or minus sign for the work done by each force. note: the four forces are the force p, the frictional force f, the normal forcen, and the force due to gravitymg.

676.2 J

Explanation:

mass m=46 kg

displacement S= 7.5 m

coefficient of kinetic friction is 0.20.

The applied force does work;

The frictional force

=

Now F_N= mg = 46*9.8

therefore,

= -676.2 J

The normal force and gravity do NO WORK,because they act at 90 degrees to displacement.

the work done on the box by each of the four forces that act on the box= 676.2 J

- measure reactants precisely. ( first choice)

- stir to the reaction take place. ( second choice)

- wait patiently until the reaction completes. ( fourth choice)

- make sure to recover as much copper as possible. ( last choice)