Forces, Vectors and Friction
What I have learned: *Force Earth= the force exerted by the Earth that is pulling an object vertically downward -> Force Earth pulls down at an object at 9.8m/s^2 *Force Ground= the force exerted by the ground that is perpendicular to the ground *Force Normal= the perpendicular force to the surface -> If the ground is horizontal= force ground is vertical, but if the ground is tilted at an angle= force ground is pointing 90 degrees perpendicular to the ground -> It does not have to be specifically the ground. It is just the force of the surface. If I want to draw a force diagram of a cup on a table, the force of the surface is called Force Table. *Force Net= Mass x Acceleration *Newton= (Kilogram)(meters/second^2) *1 Newton is 100 grams *When finding forces, you can use sine, cosine, and tangent. Another way is to add vectors and to use trigonometry there too. *Newton's First Law: An object at rest tends to stay at rest and an object in motion te