Find an expression for the normal force n acting on the car when it is at the top of the arc. (use any variable or symbol stated above along with the following as necessary: m and g.)

Explanation:

As we know that when an object moves in a circle with uniform speed then the force required by the object in moving the circular path is known as centripetal force.

This force is always towards the center of the circle and points towards it

This force is the sum of all forces towards the center

so we have

so we have

28. evolution

29. environment, survive, offspring  

explanation:

3.2x10^7