Question

A roller skater kept her balance and traveled in a perfect straight line. Her motion slowed down as she cruised along the street. Which of the following statements describes the forces on the skater?

a The net force was not 0 on the skater during her motion
b the net force was 0 which is why the skater is moving in a straight line
c the forces were unbalanced due to the skater's inertia
d the forces were balanced due to the action-reaction pair required to cruise

Answer 1

The net force on the roller skater is zero, which is why she is moving in a straight line.

Step-by-step explanation:

The correct answer is b. The net force was 0 which is why the skater is moving in a straight line. According to Newton's first law of motion, an object will continue to move in a straight line at a constant velocity unless acted upon by an external net force. In this case, as the roller skater is moving in a perfect straight line, it implies that the net force on the skater is zero. The forces acting on the skater are balanced, resulting in no acceleration or change in motion.