Question

The 0.8−mg car travels over the hill having the shape of a parabola. when the car is at point a, it is traveling at 9 m/s and increasing its speed at 3 m/s2

Answer 1

Given:

A 0.8-kg car that travels over a hill (parabola). When the car is at point a, it is traveling at 9 meters per second. Its acceleration is 3 m/s^2. The force that it needs is represented by this equation:

F = ma

where F is the force 
           m is the mass of the car
           a is the acceleration of the car

F = 0.8 kg * 3 m/s^2
   = 2.4 N