Juanita studies several free-body diagrams in which a normal force is shown. What is always true about a normal force in a free-body diagram? It is opposite the weight. It is perpendicular to a surface. It is opposite the net force. It is parallel to a surface.

answer; i do believe the correct answer is (river); /// good luck

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

hope this : )