1. A race car has a mass of 710 kg. It starts from rest and reaches a final speed of 12.0 m/s in 3 seconds. If the car is
uniformly accelerating during the entire time, what is the net force acting on it?

According to piaget’s stages of cognitive development, the child does not differentiate between self and other objects. the child repeats rewarding activities, discovers new ways to get what he or she wants, and may have imaginary friends. which period is described?