Laura sees a horse pulling a buggy. she wonders how it can accelerate if the action of the horse pulling the cart would causes an equal and opposite reaction of the cart pulling on the horse. which explanation best answers her question? a. the net forces exerted on the the horse and cart are the same, but the action force is larger. b. the net forces exerted on the the horse and cart are the same, but they are in the same direction. c. the net forces exerted on the the horse and cart are not the same, so the two forces cancel out. d. the net forces exerted on the the horse and cart are not the same, so they are not balanced forces.

The net forces on the horse and cart are not the same as the ground also applies the force of friction on the horse due to which both the horse and the cart are able to move forward. Hence, there is an unbalanced force on the horse due to friction from the ground as the horse also pushes the ground backwards (action) and the ground pushes the horse in the forward direction (reaction) due to which the horse and the cart are able to move forward.

Hence, the option D is correct.

d) physical means can be used to separate the components of air.

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards