Question

raj is goofing around and pushes his wife anika in a cardboard box across the living room floor. the combined weight of anika and the box is 620 newtons. after anika sits in the box, raj pushes the box with a force of 300 newtons to the right. the force of friction between the box and the floor is 180 newtons.
complete the sentence.
when raj pushes the cardboard box, the magnitude of the boxs velocity ________.
increases decreases does not change

Explanation:

Step1: Calculate net horizontal force

Net force = Applied force - Friction force
$F_{net} = 300\ \text{N} - 180\ \text{N} = 120\ \text{N}$ (to the right)

Step2: Relate net force to motion

A positive net force means acceleration in the direction of motion, so velocity magnitude increases.

Answer:

increases