Question

question 1
if a race car is traveling around a circular track at a constant speed of 75 mph, we know that the car experiences
a net force in the forward direction.
a centripetal force.
no net force.
a centrifugal force.

Explanation:

When an object moves in a circular path at a constant speed, it has a changing velocity (due to changing direction), and according to Newton's second - law, a net force must act on it. This force is called the centripetal force, which acts towards the center of the circle. A centrifugal force is a pseudo - force and not a real force acting on the car in an inertial frame. There is no net forward force as the speed is constant, and there must be a net force for circular motion.

Answer:

A centripetal force.