Question #c1adf
1 Answer
Nov 15, 2017
Free Body Diagrams consist of all forces in the system
Explanation:
In every case, there is an arrow pointing straight down that represents mg (mass * gravity). Then, assuming the truck is sitting on a surface, you will have a normal force pushing straight up and having exactly the same amount of force as mg pulling down.
If there are no other forces, such as applied force to make it move, that's all there is to it.
Note that if the truck was falling through the air, such as if it had been dropped from an airplane, there would be no normal force because a surface is required for a normal force.
