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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 centripetal acceleration directed towards the center of the circle. According to Newton's second - law ($F = ma$), this acceleration requires a net force, which is the centripetal force. A net force in the forward direction would cause the car to speed up. There is a net force (centripetal force) acting on the car, so it's not the case that there is no net force. Centrifugal force is a pseudo - force observed from a non - inertial frame of reference attached to the moving object, and in an inertial frame (the frame of an observer on the ground), the force acting on the car moving in a circle is the centripetal force.

Answer:

a centripetal force.