Why should you not erase construction lines?

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?

If a simple machine reduces the strength of a force, what must be increased?

Adisk with a radius of r is oriented with its normal unit vector at an angle q with respect to a uniform electric field. which of the following would result in an increase in the electric flux through the disk? check all that apply? a. increasing the area of the disk b. decreasing the given orientation angle of the disk c. decreasing the strength of the electric field d. increasing the given orientation angle of the disk, but not exceeding an angle of 90