Which statement about horizontal stretch and reflection is true?

a. horizontal stretch preserves distance, but reflection does not.
b. reflection preserves distance, but horizontal stretch does not.
c. both horizontal stretch and reflection preserve distance.
d. neither horizontal stretch nor reflection preserves distance.

Many machines- including inclined planes such as ramps- increase the strength of the force put into the machine but decrease the distance over which the force is applied.

Light that is polarized along the vertical direction is incident on a sheet of polarizing material. only 96% of the intensity of the light passes through the sheet and strikes a second sheet of polarizing material. no light passes through the second sheet. what angle does the transmission axis of the second sheet make with the vertical?

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?