A 10.0 kg box is dragged on a horizontal frictionless surface by a horizontal force of 10.0 N. If the applied force is doubled, the normal force on the box will (a)Increase

(b)Remain the same

(c)Decrease

and explain.

It will remain the same.

Explanation:

Because the force is horizontal, there is no y-component to add to the gravitational force to affect the normal force, since the normal force will be directed straight up because it is on a horizontal surface.

total distance/total time

(85 + 82)/(5+3)

167/8

20 just over

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y